Q: What is the sum of all factors of the number 21,911 excluding 21,911?

 A: 1

Why is 1 the sum of all factors of 21,911, excluding 21,911?

The factors of the number 21,911 are: 1, 21911.

If you add them up, you will get the total of 21,912. Now subtract 21,911 to get 1


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