Q: What is the sum of all factors of the number 391,720 excluding 391,720?
A: 616,280
The factors of the number 391,720 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 1399, 2798, 5596, 6995, 9793, 11192, 13990, 19586, 27980, 39172, 48965, 55960, 78344, 97930, 195860, 391720.
If you add them up, you will get the total of 392,336. Now subtract 391,720 to get 616,280