Q: What is the sum of all factors of the number 421,840 excluding 421,840?
A: 559,124
The factors of the number 421,840 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5273, 10546, 21092, 26365, 42184, 52730, 84368, 105460, 210920, 421840.
If you add them up, you will get the total of 422,399. Now subtract 421,840 to get 559,124