Q: What is the sum of all factors of the number 664,420 including 664,420?
A: 1,411,200
The factors of the number 664,420 are: 1, 2, 4, 5, 10, 20, 139, 239, 278, 478, 556, 695, 956, 1195, 1390, 2390, 2780, 4780, 33221, 66442, 132884, 166105, 332210, 664420.
If you add them up, you will get the total of 1,411,200.