Q: What is the sum of all factors of the number 21,520 including 21,520?
A: 50,220
The factors of the number 21,520 are: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269, 538, 1076, 1345, 2152, 2690, 4304, 5380, 10760, 21520.
If you add them up, you will get the total of 50,220.