Q: What is the sum of all factors of the number 21,155,221 excluding 21,155,221?
A: 616,067
The factors of the number 21,155,221 are: 1, 41, 241, 2141, 9881, 87781, 515981, 21155221.
If you add them up, you will get the total of 21,155,837. Now subtract 21,155,221 to get 616,067