Q: What is the sum of all factors of the number 108,420 excluding 108,420?

A: 220,860

Why is 220,860 the sum of all factors of 108,420, excluding 108,420?

The factors of the number 108,420 are: 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 139, 156, 195, 260, 278, 390, 417, 556, 695, 780, 834, 1390, 1668, 1807, 2085, 2780, 3614, 4170, 5421, 7228, 8340, 9035, 10842, 18070, 21684, 27105, 36140, 54210, 108420.

If you add them up, you will get the total of 108,640. Now subtract 108,420 to get 220,860