Q: What is the sum of all factors of the number 20,821,840 excluding 20,821,840?

A: 31,315,448

Why is 31,315,448 the sum of all factors of 20,821,840, excluding 20,821,840?

The factors of the number 20,821,840 are: 1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20021, 40042, 80084, 100105, 160168, 200210, 260273, 320336, 400420, 520546, 800840, 1041092, 1301365, 1601680, 2082184, 2602730, 4164368, 5205460, 10410920, 20821840.

If you add them up, you will get the total of 20,821,871. Now subtract 20,821,840 to get 31,315,448