Q: What is the sum of all factors of the number 13,509 excluding 13,509?
A: 7,291
The factors of the number 13,509 are: 1, 3, 9, 19, 57, 79, 171, 237, 711, 1501, 4503, 13509.
If you add them up, you will get the total of 13,516. Now subtract 13,509 to get 7,291