Q: What is the sum of all factors of the number 400,800 excluding 400,800?

A: 911,616

Why is 911,616 the sum of all factors of 400,800, excluding 400,800?

The factors of the number 400,800 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 32, 40, 48, 50, 60, 75, 80, 96, 100, 120, 150, 160, 167, 200, 240, 300, 334, 400, 480, 501, 600, 668, 800, 835, 1002, 1200, 1336, 1670, 2004, 2400, 2505, 2672, 3340, 4008, 4175, 5010, 5344, 6680, 8016, 8350, 10020, 12525, 13360, 16032, 16700, 20040, 25050, 26720, 33400, 40080, 50100, 66800, 80160, 100200, 133600, 200400, 400800.

If you add them up, you will get the total of 401,711. Now subtract 400,800 to get 911,616