mattce wrote:
Bunuel wrote:
mattce wrote:
Hey Bunuel or others:
Could you please show a proof for this?
Thanks
Check for some perfect squares:
1 --> the sum factors = 1;
4 --> the sum factors = 7;
9 --> the sum factors = 13;
...
To see that the reverse is not always true check for 2 --> the sum factors = 3.
Hope it helps.
Haha, yeah I know that it's true by doing examples -- I was hoping for a formal proof though, if possible?
You can do it yourself using the formula for the sum of the factors given here: math-number-theory-88376.html