Q: What is the sum of all factors of the number 31,320 excluding 31,320?

A: 76,680

Why is 76,680 the sum of all factors of 31,320, excluding 31,320?

The factors of the number 31,320 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 29, 30, 36, 40, 45, 54, 58, 60, 72, 87, 90, 108, 116, 120, 135, 145, 174, 180, 216, 232, 261, 270, 290, 348, 360, 435, 522, 540, 580, 696, 783, 870, 1044, 1080, 1160, 1305, 1566, 1740, 2088, 2610, 3132, 3480, 3915, 5220, 6264, 7830, 10440, 15660, 31320.

If you add them up, you will get the total of 31,396. Now subtract 31,320 to get 76,680