Q: What is the sum of all factors of the number 21,123,209 excluding 21,123,209?
A: 12,871
The factors of the number 21,123,209 are: 1, 1931, 10939, 21123209.
If you add them up, you will get the total of 21,123,221. Now subtract 21,123,209 to get 12,871