Q: What is the sum of all factors of the number 405,680 excluding 405,680?

A: 625,504

Why is 625,504 the sum of all factors of 405,680, excluding 405,680?

The factors of the number 405,680 are: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 461, 880, 922, 1844, 2305, 3688, 4610, 5071, 7376, 9220, 10142, 18440, 20284, 25355, 36880, 40568, 50710, 81136, 101420, 202840, 405680.

If you add them up, you will get the total of 406,305. Now subtract 405,680 to get 625,504