Q: What is the sum of all factors of the number 1,800,721 excluding 1,800,721?
A: 138,531
The factors of the number 1,800,721 are: 1, 13, 138517, 1800721.
If you add them up, you will get the total of 1,800,859. Now subtract 1,800,721 to get 138,531