Q: What is the sum of all factors of the number 15,991,871 excluding 15,991,871?
A: 2,309,089
The factors of the number 15,991,871 are: 1, 7, 1277, 1789, 8939, 12523, 2284553, 15991871.
If you add them up, you will get the total of 15,991,873. Now subtract 15,991,871 to get 2,309,089