Q: What is the sum of all factors of the number 688,640 excluding 688,640?

A: 968,620

Why is 968,620 the sum of all factors of 688,640, excluding 688,640?

The factors of the number 688,640 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 269, 320, 512, 538, 640, 1076, 1280, 1345, 2152, 2560, 2690, 4304, 5380, 8608, 10760, 17216, 21520, 34432, 43040, 68864, 86080, 137728, 172160, 344320, 688640.

If you add them up, you will get the total of 689,608. Now subtract 688,640 to get 968,620