Q: What is the sum of all factors of the number 21,381,389 excluding 21,381,389?

 A: 1

Why is 1 the sum of all factors of 21,381,389, excluding 21,381,389?

The factors of the number 21,381,389 are: 1, 21381389.

If you add them up, you will get the total of 21,381,390. Now subtract 21,381,389 to get 1


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