Q: What is the sum of all factors of the number 639,904 including 639,904?
A: 1,259,874
The factors of the number 639,904 are: 1, 2, 4, 8, 16, 32, 19997, 39994, 79988, 159976, 319952, 639904.
If you add them up, you will get the total of 1,259,874.