Q: What is the sum of all factors of the number 1,987 excluding 1,987?

 A: 1

Why is 1 the sum of all factors of 1,987, excluding 1,987?

The factors of the number 1,987 are: 1, 1987.

If you add them up, you will get the total of 1,988. Now subtract 1,987 to get 1


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