Q: What is the sum of all factors of the number 1,997 excluding 1,997?

 A: 1

Why is 1 the sum of all factors of 1,997, excluding 1,997?

The factors of the number 1,997 are: 1, 1997.

If you add them up, you will get the total of 1,998. Now subtract 1,997 to get 1


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