Q: What is the sum of all factors of the number 1,999 excluding 1,999?

 A: 1

Why is 1 the sum of all factors of 1,999, excluding 1,999?

The factors of the number 1,999 are: 1, 1999.

If you add them up, you will get the total of 2,000. Now subtract 1,999 to get 1


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