Q: What is the sum of all factors of the number 321,640 excluding 321,640?

A: 533,720

Why is 533,720 the sum of all factors of 321,640, excluding 321,640?

The factors of the number 321,640 are: 1, 2, 4, 5, 8, 10, 11, 17, 20, 22, 34, 40, 43, 44, 55, 68, 85, 86, 88, 110, 136, 170, 172, 187, 215, 220, 340, 344, 374, 430, 440, 473, 680, 731, 748, 860, 935, 946, 1462, 1496, 1720, 1870, 1892, 2365, 2924, 3655, 3740, 3784, 4730, 5848, 7310, 7480, 8041, 9460, 14620, 16082, 18920, 29240, 32164, 40205, 64328, 80410, 160820, 321640.

If you add them up, you will get the total of 322,173. Now subtract 321,640 to get 533,720