Q: What is the sum of all factors of the number 13,013,721 excluding 13,013,721?

A: 10,573,479

Why is 10,573,479 the sum of all factors of 13,013,721, excluding 13,013,721?

The factors of the number 13,013,721 are: 1, 3, 7, 9, 17, 21, 29, 51, 63, 87, 119, 153, 203, 261, 357, 419, 493, 609, 1071, 1257, 1479, 1827, 2933, 3451, 3771, 4437, 7123, 8799, 10353, 12151, 21369, 26397, 31059, 36453, 49861, 64107, 85057, 109359, 149583, 206567, 255171, 448749, 619701, 765513, 1445969, 1859103, 4337907, 13013721.

If you add them up, you will get the total of 13,013,731. Now subtract 13,013,721 to get 10,573,479