Q: What is the sum of all factors of the number 399,690 excluding 399,690?
A: 639,738
The factors of the number 399,690 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 4441, 8882, 13323, 22205, 26646, 39969, 44410, 66615, 79938, 133230, 199845, 399690.
If you add them up, you will get the total of 400,329. Now subtract 399,690 to get 639,738