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hmm... i never seen this ... could you elaborate?

so it would be |dw:1344116637049:dw|

Oh wait, it does work! I'm guessing that means that the formula is correct?

|dw:1344117005528:dw|
4 is missing

But 7 x 4 = 28
1 + 2 + 3 + 4 + 6 + 12 = 28

hmm ... try this for any other number
let it for 9

It should be 13. Using the formula.

|dw:1344117256625:dw|
interesting ...do you know what does this work?

I have no idea how this works...it's number theory, but I don't know why it works...

|dw:1344118722255:dw|
what't the deal with this?
seems the sum of factors is never a prime no

|dw:1344119038064:dw|

What? I'm not really following...

the sum of factors is equal to the ... = product of geometric sum of prime divisors.

waw ... nice!!

lol ... this is easy.

Not sure this workds
let a number \( X \) has prime factors \( a^n \) and \( b^m\)

eg ... X = a^n*b^m
a = 1*a
b = 1*b

yep ... who want's to calculate that long?? I wouldn't even ask wolf ..

lol...me either...thanks again :)

yw .. and thank you too for ... this Q

lol np :) KG just watching from a distance XD

I am not familiar with the totient formula, so I'm clueless...

Why this works, is actually pretty neat, although a little messy to prove.