Q: What is the sum of all factors of the number 10,215 excluding 10,215?
A: 7,569
The factors of the number 10,215 are: 1, 3, 5, 9, 15, 45, 227, 681, 1135, 2043, 3405, 10215.
If you add them up, you will get the total of 10,222. Now subtract 10,215 to get 7,569