Q: What is the sum of all factors of the number 1,404 excluding 1,404?
A: 2,516
The factors of the number 1,404 are: 1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 27, 36, 39, 52, 54, 78, 108, 117, 156, 234, 351, 468, 702, 1404.
If you add them up, you will get the total of 1,406. Now subtract 1,404 to get 2,516