Q: What is the sum of all factors of the number 421,720 including 421,720?
A: 1,023,120
The factors of the number 421,720 are: 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 811, 1622, 3244, 4055, 6488, 8110, 10543, 16220, 21086, 32440, 42172, 52715, 84344, 105430, 210860, 421720.
If you add them up, you will get the total of 1,023,120.