Q: What is the sum of all factors of the number 21,243,135 excluding 21,243,135?

 A: 12,745,905

Why is 12,745,905 the sum of all factors of 21,243,135, excluding 21,243,135?

The factors of the number 21,243,135 are: 1, 3, 5, 15, 1416209, 4248627, 7081045, 21243135.

If you add them up, you will get the total of 21,243,147. Now subtract 21,243,135 to get 12,745,905


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