Q: What is the sum of all factors of the number 2,100,021 excluding 2,100,021?
A: 1,391,307
The factors of the number 2,100,021 are: 1, 3, 7, 11, 21, 33, 77, 231, 9091, 27273, 63637, 100001, 190911, 300003, 700007, 2100021.
If you add them up, you will get the total of 2,100,022. Now subtract 2,100,021 to get 1,391,307