Q: What is the sum of all factors of the number 20,405,138 excluding 20,405,138?
A: 12,639,622
The factors of the number 20,405,138 are: 1, 2, 13, 26, 557, 1114, 1409, 2818, 7241, 14482, 18317, 36634, 784813, 1569626, 10202569, 20405138.
If you add them up, you will get the total of 20,405,150. Now subtract 20,405,138 to get 12,639,622