Q: What is the sum of all factors of the number 5,145 excluding 5,145?
A: 4,455
The factors of the number 5,145 are: 1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 5145.
If you add them up, you will get the total of 5,149. Now subtract 5,145 to get 4,455