Q: What is the sum of all factors of the number 393,880 excluding 393,880?
A: 516,920
The factors of the number 393,880 are: 1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 229, 344, 430, 458, 860, 916, 1145, 1720, 1832, 2290, 4580, 9160, 9847, 19694, 39388, 49235, 78776, 98470, 196940, 393880.
If you add them up, you will get the total of 394,396. Now subtract 393,880 to get 516,920