Q: What is the sum of all factors of the number 209,820 excluding 209,820?

A: 425,220

Why is 425,220 the sum of all factors of 209,820, excluding 209,820?

The factors of the number 209,820 are: 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 269, 390, 538, 780, 807, 1076, 1345, 1614, 2690, 3228, 3497, 4035, 5380, 6994, 8070, 10491, 13988, 16140, 17485, 20982, 34970, 41964, 52455, 69940, 104910, 209820.

If you add them up, you will get the total of 210,245. Now subtract 209,820 to get 425,220