Q: What is the sum of all factors of the number 639,668 including 639,668?
A: 1,145,760
The factors of the number 639,668 are: 1, 2, 4, 43, 86, 172, 3719, 7438, 14876, 159917, 319834, 639668.
If you add them up, you will get the total of 1,145,760.