Q: What is the sum of all factors of the number 21,387,221 excluding 21,387,221?
A: 646,243
The factors of the number 21,387,221 are: 1, 37, 421, 1373, 15577, 50801, 578033, 21387221.
If you add them up, you will get the total of 21,387,867. Now subtract 21,387,221 to get 646,243