Amicable Numbers

[GekkeDennis15]

If you add up the proper dividors of 12496, you get 14288.

If you add up the proper dividors of 14288, you get 15472.

If you add up the proper dividors of 15472, you get 14536.

If you add up the proper dividors of 14536, you get 14264.

If you add up the proper dividors of 14264, you get 12496, which is the number we started with.

5-way-amicable number?

[MrKorthos]

The jewelry at the end was really sweet

[HellsFryingPan]

so I guess we now have several mathematical expressions for imaginary friends?

220i

284i

[HoorayBier]

Is it ironic that the 284 who founded what he studies (Group Theory) died in a duel over the love of a 220?

[HoorayBier]

@HoorayBier I should probably correct that. Galois coined it group theory, Euler developed it.

[MrEmreD]

dont wanna be sexist but those 220s are all female!

[GuitarFreak807]

@MrStuckyJ That's awesome. Haha  i is less than 3u also known as i<3u

[Lightn0x]

And THAT is something new I've learnt today :) .. And something very interesting

[guitarfreak12398]

its valentines day 2011!

[Blackcat008]

I'm more of a 6

[anticorncob6]

The sum of the factors of 1,264,460 is 1,547,860.

The sum of the factors of 1,547,860 is 1,727,636

The sum of the factors of 1,727,636 is 1,305,184

The sum of the factors of 1,305, 184 is 1,264,469 which is the number we started with.

[Blackcat008]

@anticorncob6 number orgy?

[anticorncob6]

@Blackcat008 They're called "sociable numbers"

[froggythebob]

That was such a good video. Math lesson and deep thoughts all in one? Yes plz.

[buffita74]

I wonder if there is an infinite number of amicable numbers. If so I would presume the proof of such would be quite difficult. Any thoughts?

[TheAwesomeBrandon]

Over 9.... million...

[deepfiligree]

Was that a custom necklace? Or is there somewhere I could purchase one?

[singingbanana]

@deepfiligree I had it made.

[basketcase0a0]

huey lewis is the man, nice reference

[VincentVega44]

bravo

[musicaltyping]

is 144+12y+y^2 a perfect square.

sorry i'm sure you think im dumb for not knowing this but i'm kind of stuck

[MrStuckyJ]

well, no, but 144 + 24y + y^2 is. this pattern is known as the trinomial square

[MrStuckyJ]

144 + 24y + y^2 = (y + 12)(y + 12)

[squaltch]

it's videos like this that make me wish you were my maths teacher.

[stormtrooper9314]

your awesome! i wish i had your number skills

[Error081688]

I watched it again. haha this is more meaningful to me than it should be :D

[KV123HaV]

Great videos!

[Ivansky1]

Great Thought!!!!!!!!!!

[ghbinder]

what did you say descartes rediscovered the number of ninth century what?

[MaffiasAngelO88]

Loved the vid, took a replay to get it, but I think I'm there now =)

Peace

[MrStuckyJ]

simplify the following equation:

9x-7i > 3(3x-7u)

[singingbanana]

Nice :)

[HappyLappyNappy]

I think the second bit is:

9x-21u

not sure

[ablokenamedbob]

@MrStuckyJ 

i < 3u

am I missing something?

[Jargonaught]

@ablokenamedbob don't you get it?

i < 3u

i <3 u

<3 = heart/love

[StormySky7]

@MrStuckyJ -7i > -21u.

Derp.

[Tranquilance]

@MrStuckyJ inequation*

[TyYann]

NIce necklaces! And nice video!

[cardsfan7012]

Your videos are so great! I wish I was as smart as you.

[EclecticSceptic]

Interesting video!

[askmagus]

I wonder, if there are any pairs of Amicable numbers, which when added together, become a perfect number! =^_^=

Ill attempt to find out! XD

[kthebest14]

wow great idea!

[2718rob]

<3 this guy

[Xhez2slash]

777 views with 77 ratings...!

[Ilopsen]

So ingenious, yet so romantic.

[nuttyprofesser1]

imagine if you had numbers as words i think it would be somthing like this

H3110, d0 u \/\/@/\/ /\/ @ 13 /\/\y 284?

Hello, do u wanna b my 284?

lol....

[termanator657]

nice chain

[scotland7yard]

Are there 3 numbers A, B and C such that proper divisors of A add up B, proper divisors of B add up C and proper divisors of C add up A...?

(yes, it's a complicated relationship I'm in)

[singingbanana]

Haha! It' a good question though, I don't know!

[mpereztwomx]

great question

[theboombody]

A Cambridge professor quoting Huey Lewis and the News? My gosh, the world is broken.

[Makaraka222]

2:12 ITS OVER 9,000,000!!!!!

[benjaminp4]

@Makaraka222 I WAS THINKING THE SAME THING!

[DAWNCB]

you have perfect eyebrows...lol...cutey

[7thLunaDancer]

lol, i wonder who the other half of the 220 or 284 hearts belongs to

[EighteenCharacters]

Happy V-day'z to you too.

[TheSingingNerd]

Great video, as usual - I had never heard of Amicable Numbers (and I majored in math in college...)

[theboombody]

@TheSingingNerd

Same here. I first heard of them reading a book called "The HouseKeeper and the Professor" long after graduating. Now I see why they're not taught in college though. They seem to be too rare to have any obvious practical use.

[heero854]

You can resort to numbers for any situation, can't ya?

[PolarBearMath]

I love it when you talk mathy ;)

[maxgotborred]

ur like a relationship doctor or something

[Theowest]

I don't think math is so interesting sometimes but YOU make it interesting...

[shikamarusgirl17]

Oh wow~ That's so cool!! A sixteen year old kid, huh? Wow. Smart kid!!

[theboombody]

@shikamarusgirl17

I figured it was Gauss, but Gauss's name wasn't mentioned.

[singingbanana]

It was a guy called B. Nicolò I. Paganini, not to be confused with the violinist of the same name.

[SoySauce4Lube]

its sad i understand all your videos but i cant pass algebra 1 part 1......

[MrStuckyJ]

thanks, we have not seen a video from you in a while :-)

[Error081688]

by the way, do you know what ever happened to undunc? I took an Uncertaintly Analysis course with NASA, and the videos he put out were actually pretty useful.

[singingbanana]

No, I should ask, because they made about 18 videos. But they did it all in one day, so maybe something didn't work out. I'll send you some other videos from David.

[Error081688]

brilliant.

[icyhotkid]

you rock

[charizard1357911]

see i can learnn maths and history from this in 3 minutes instead of learnin them in school for an hour

[Alfalotter]

woot!

[1123581321enter]

Nice

[marcusFOREVER]

ok nice

[Boznian95]

cool i like how u combined math and valentines day

[TH3GHOST2]

wow you combine history, science and maths

[knome434]

first. Nice video