Q: What is the sum of all factors of the number 780,720 excluding 780,720?

A: 1,640,256

Why is 1,640,256 the sum of all factors of 780,720, excluding 780,720?

The factors of the number 780,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 3253, 6506, 9759, 13012, 16265, 19518, 26024, 32530, 39036, 48795, 52048, 65060, 78072, 97590, 130120, 156144, 195180, 260240, 390360, 780720.

If you add them up, you will get the total of 780,721. Now subtract 780,720 to get 1,640,256