Q: What is the sum of all factors of the number 21,411 excluding 21,411?
A: 13,309
The factors of the number 21,411 are: 1, 3, 9, 13, 27, 39, 61, 117, 183, 351, 549, 793, 1647, 2379, 7137, 21411.
If you add them up, you will get the total of 21,424. Now subtract 21,411 to get 13,309