Q: What is the sum of all factors of the number 38,520 excluding 38,520?

A: 87,840

Why is 87,840 the sum of all factors of 38,520, excluding 38,520?

The factors of the number 38,520 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 107, 120, 180, 214, 321, 360, 428, 535, 642, 856, 963, 1070, 1284, 1605, 1926, 2140, 2568, 3210, 3852, 4280, 4815, 6420, 7704, 9630, 12840, 19260, 38520.

If you add them up, you will get the total of 38,607. Now subtract 38,520 to get 87,840