Q: What is the sum of all factors of the number 388,689 excluding 388,689?
A: 213,423
The factors of the number 388,689 are: 1, 3, 7, 21, 83, 223, 249, 581, 669, 1561, 1743, 4683, 18509, 55527, 129563, 388689.
If you add them up, you will get the total of 388,902. Now subtract 388,689 to get 213,423