Q: What is the sum of all factors of the number 12,480 excluding 12,480?

A: 30,192

Why is 30,192 the sum of all factors of 12,480, excluding 12,480?

The factors of the number 12,480 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 32, 39, 40, 48, 52, 60, 64, 65, 78, 80, 96, 104, 120, 130, 156, 160, 192, 195, 208, 240, 260, 312, 320, 390, 416, 480, 520, 624, 780, 832, 960, 1040, 1248, 1560, 2080, 2496, 3120, 4160, 6240, 12480.

If you add them up, you will get the total of 12,510. Now subtract 12,480 to get 30,192