Q: What is the sum of all factors of the number 27,391 excluding 27,391?
A: 7,721
The factors of the number 27,391 are: 1, 7, 13, 43, 49, 91, 301, 559, 637, 2107, 3913, 27391.
If you add them up, you will get the total of 27,398. Now subtract 27,391 to get 7,721