Q: What is the sum of all factors of the number 21,351,137 excluding 21,351,137?

 A: 21,043

Why is 21,043 the sum of all factors of 21,351,137, excluding 21,351,137?

The factors of the number 21,351,137 are: 1, 1069, 19973, 21351137.

If you add them up, you will get the total of 21,351,158. Now subtract 21,351,137 to get 21,043


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