Q: What is the sum of all factors of the number 20,989 including 20,989?

 A: 21,280

Why is 21,280 the sum of all factors of 20,989, including 20,989?

The factors of the number 20,989 are: 1, 139, 151, 20989.

If you add them up, you will get the total of 21,280.


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