Q: What is the sum of all factors of the number 8,428 excluding 8,428?
A: 9,128
The factors of the number 8,428 are: 1, 2, 4, 7, 14, 28, 43, 49, 86, 98, 172, 196, 301, 602, 1204, 2107, 4214, 8428.
If you add them up, you will get the total of 8,437. Now subtract 8,428 to get 9,128