Q: What is the sum of all factors of the number 640,042 excluding 640,042?
A: 408,278
The factors of the number 640,042 are: 1, 2, 13, 26, 103, 206, 239, 478, 1339, 2678, 3107, 6214, 24617, 49234, 320021, 640042.
If you add them up, you will get the total of 640,450. Now subtract 640,042 to get 408,278