Q: What is the sum of all factors of the number 21,135 excluding 21,135?
A: 12,705
The factors of the number 21,135 are: 1, 3, 5, 15, 1409, 4227, 7045, 21135.
If you add them up, you will get the total of 21,147. Now subtract 21,135 to get 12,705