Q: What is the sum of all factors of the number 255,645 excluding 255,645?

A: 268,515

Why is 268,515 the sum of all factors of 255,645, excluding 255,645?

The factors of the number 255,645 are: 1, 3, 5, 9, 13, 15, 19, 23, 39, 45, 57, 65, 69, 95, 115, 117, 171, 195, 207, 247, 285, 299, 345, 437, 585, 741, 855, 897, 1035, 1235, 1311, 1495, 2185, 2223, 2691, 3705, 3933, 4485, 5681, 6555, 11115, 13455, 17043, 19665, 28405, 51129, 85215, 255645.

If you add them up, you will get the total of 255,913. Now subtract 255,645 to get 268,515