Q: What is the sum of all factors of the number 399,580 excluding 399,580?
A: 439,580
The factors of the number 399,580 are: 1, 2, 4, 5, 10, 20, 19979, 39958, 79916, 99895, 199790, 399580.
If you add them up, you will get the total of 400,019. Now subtract 399,580 to get 439,580