Q: What is the sum of all factors of the number 3,255 excluding 3,255?
A: 2,889
The factors of the number 3,255 are: 1, 3, 5, 7, 15, 21, 31, 35, 93, 105, 155, 217, 465, 651, 1085, 3255.
If you add them up, you will get the total of 3,257. Now subtract 3,255 to get 2,889