Q: What is the sum of all factors of the number 815,885,720 excluding 815,885,720?

A: 1,161,069,400

Why is 1,161,069,400 the sum of all factors of 815,885,720, excluding 815,885,720?

The factors of the number 815,885,720 are: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 1569011, 3138022, 6276044, 7845055, 12552088, 15690110, 20397143, 31380220, 40794286, 62760440, 81588572, 101985715, 163177144, 203971430, 407942860, 815885720.

If you add them up, you will get the total of 815,885,721. Now subtract 815,885,720 to get 1,161,069,400