Q: What is the sum of all factors of the number 7,215 excluding 7,215?
A: 5,553
The factors of the number 7,215 are: 1, 3, 5, 13, 15, 37, 39, 65, 111, 185, 195, 481, 555, 1443, 2405, 7215.
If you add them up, you will get the total of 7,220. Now subtract 7,215 to get 5,553