Q: What is the sum of all factors of the number 307,920 excluding 307,920?

A: 647,376

Why is 647,376 the sum of all factors of 307,920, excluding 307,920?

The factors of the number 307,920 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 1283, 2566, 3849, 5132, 6415, 7698, 10264, 12830, 15396, 19245, 20528, 25660, 30792, 38490, 51320, 61584, 76980, 102640, 153960, 307920.

If you add them up, you will get the total of 308,567. Now subtract 307,920 to get 647,376