Q: What is the sum of all factors of the number 138,720 excluding 138,720?

A: 325,464

Why is 325,464 the sum of all factors of 138,720, excluding 138,720?

The factors of the number 138,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 32, 34, 40, 48, 51, 60, 68, 80, 85, 96, 102, 120, 136, 160, 170, 204, 240, 255, 272, 289, 340, 408, 480, 510, 544, 578, 680, 816, 867, 1020, 1156, 1360, 1445, 1632, 1734, 2040, 2312, 2720, 2890, 3468, 4080, 4335, 4624, 5780, 6936, 8160, 8670, 9248, 11560, 13872, 17340, 23120, 27744, 34680, 46240, 69360, 138720.

If you add them up, you will get the total of 139,045. Now subtract 138,720 to get 325,464