Q: What is the sum of all factors of the number 838,640 excluding 838,640?

A: 1,290,688

Why is 1,290,688 the sum of all factors of 838,640, excluding 838,640?

The factors of the number 838,640 are: 1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 953, 1906, 3812, 4765, 7624, 9530, 10483, 15248, 19060, 20966, 38120, 41932, 52415, 76240, 83864, 104830, 167728, 209660, 419320, 838640.

If you add them up, you will get the total of 838,641. Now subtract 838,640 to get 1,290,688