Q: What is the sum of all factors of the number 19,404 excluding 19,404?

A: 42,840

Why is 42,840 the sum of all factors of 19,404, excluding 19,404?

The factors of the number 19,404 are: 1, 2, 3, 4, 6, 7, 9, 11, 12, 14, 18, 21, 22, 28, 33, 36, 42, 44, 49, 63, 66, 77, 84, 98, 99, 126, 132, 147, 154, 196, 198, 231, 252, 294, 308, 396, 441, 462, 539, 588, 693, 882, 924, 1078, 1386, 1617, 1764, 2156, 2772, 3234, 4851, 6468, 9702, 19404.

If you add them up, you will get the total of 19,446. Now subtract 19,404 to get 42,840