Q: What is the sum of all factors of the number 12,255 including 12,255?
A: 21,120
The factors of the number 12,255 are: 1, 3, 5, 15, 19, 43, 57, 95, 129, 215, 285, 645, 817, 2451, 4085, 12255.
If you add them up, you will get the total of 21,120.