Q: What is the sum of all factors of the number 108,780 excluding 108,780?

A: 255,108

Why is 255,108 the sum of all factors of 108,780, excluding 108,780?

The factors of the number 108,780 are: 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 37, 42, 49, 60, 70, 74, 84, 98, 105, 111, 140, 147, 148, 185, 196, 210, 222, 245, 259, 294, 370, 420, 444, 490, 518, 555, 588, 735, 740, 777, 980, 1036, 1110, 1295, 1470, 1554, 1813, 2220, 2590, 2940, 3108, 3626, 3885, 5180, 5439, 7252, 7770, 9065, 10878, 15540, 18130, 21756, 27195, 36260, 54390, 108780.

If you add them up, you will get the total of 109,035. Now subtract 108,780 to get 255,108