Q: What is the sum of all factors of the number 12,540 excluding 12,540?

A: 27,780

Why is 27,780 the sum of all factors of 12,540, excluding 12,540?

The factors of the number 12,540 are: 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 19, 20, 22, 30, 33, 38, 44, 55, 57, 60, 66, 76, 95, 110, 114, 132, 165, 190, 209, 220, 228, 285, 330, 380, 418, 570, 627, 660, 836, 1045, 1140, 1254, 2090, 2508, 3135, 4180, 6270, 12540.

If you add them up, you will get the total of 12,567. Now subtract 12,540 to get 27,780