Q: What is the sum of all factors of the number 720,378,389 excluding 720,378,389?

 A: 1

Why is 1 the sum of all factors of 720,378,389, excluding 720,378,389?

The factors of the number 720,378,389 are: 1, 720378389.

If you add them up, you will get the total of 720,378,390. Now subtract 720,378,389 to get 1


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