Q: What is the sum of all factors of the number 639,740 including 639,740?
A: 1,391,040
The factors of the number 639,740 are: 1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 580, 1103, 2206, 4412, 5515, 11030, 22060, 31987, 63974, 127948, 159935, 319870, 639740.
If you add them up, you will get the total of 1,391,040.