Q: What is the sum of all factors of the number 8,340 excluding 8,340?
A: 15,180
The factors of the number 8,340 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 139, 278, 417, 556, 695, 834, 1390, 1668, 2085, 2780, 4170, 8340.
If you add them up, you will get the total of 8,355. Now subtract 8,340 to get 15,180