Q: What is the sum of all factors of the number 405,240 excluding 405,240?

A: 925,320

Why is 925,320 the sum of all factors of 405,240, excluding 405,240?

The factors of the number 405,240 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 110, 120, 132, 165, 220, 264, 307, 330, 440, 614, 660, 921, 1228, 1320, 1535, 1842, 2456, 3070, 3377, 3684, 4605, 6140, 6754, 7368, 9210, 10131, 12280, 13508, 16885, 18420, 20262, 27016, 33770, 36840, 40524, 50655, 67540, 81048, 101310, 135080, 202620, 405240.

If you add them up, you will get the total of 406,165. Now subtract 405,240 to get 925,320