Q: What is the sum of all factors of the number 85,280 excluding 85,280?

A: 136,984

Why is 136,984 the sum of all factors of 85,280, excluding 85,280?

The factors of the number 85,280 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 41, 52, 65, 80, 82, 104, 130, 160, 164, 205, 208, 260, 328, 410, 416, 520, 533, 656, 820, 1040, 1066, 1312, 1640, 2080, 2132, 2665, 3280, 4264, 5330, 6560, 8528, 10660, 17056, 21320, 42640, 85280.

If you add them up, you will get the total of 85,416. Now subtract 85,280 to get 136,984