Q: What is the sum of all factors of the number 31,980 excluding 31,980?

A: 66,804

Why is 66,804 the sum of all factors of 31,980, excluding 31,980?

The factors of the number 31,980 are: 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 41, 52, 60, 65, 78, 82, 123, 130, 156, 164, 195, 205, 246, 260, 390, 410, 492, 533, 615, 780, 820, 1066, 1230, 1599, 2132, 2460, 2665, 3198, 5330, 6396, 7995, 10660, 15990, 31980.

If you add them up, you will get the total of 32,046. Now subtract 31,980 to get 66,804