Q: What is the sum of all factors of the number 1,399,820 including 1,399,820?
A: 2,939,664
The factors of the number 1,399,820 are: 1, 2, 4, 5, 10, 20, 69991, 139982, 279964, 349955, 699910, 1399820.
If you add them up, you will get the total of 2,939,664.