Q: What is the sum of all factors of the number 89,880 excluding 89,880?

A: 221,160

Why is 221,160 the sum of all factors of 89,880, excluding 89,880?

The factors of the number 89,880 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 107, 120, 140, 168, 210, 214, 280, 321, 420, 428, 535, 642, 749, 840, 856, 1070, 1284, 1498, 1605, 2140, 2247, 2568, 2996, 3210, 3745, 4280, 4494, 5992, 6420, 7490, 8988, 11235, 12840, 14980, 17976, 22470, 29960, 44940, 89880.

If you add them up, you will get the total of 90,101. Now subtract 89,880 to get 221,160