Q: What is the sum of all factors of the number 640,143 excluding 640,143?
A: 453,697
The factors of the number 640,143 are: 1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 1129, 3387, 7903, 10161, 23709, 30483, 71127, 91449, 213381, 640143.
If you add them up, you will get the total of 640,596. Now subtract 640,143 to get 453,697