What is the Sum of Factors of 20?

The Sum of Factors of 20 means that you add up all the factors of 20. You may be looking for the Sum of Factors of 20 including or excluding 20 itself.

Here is the calculation and answer to the Sum of all Factors of 20 including 20:

1 + 2 + 4 + 5 + 10 + 20 = 42

Here is the calculation and answer to the Sum of Factors of 20 if you exclude 20 itself:

1 + 2 + 4 + 5 + 10 = 22

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What is the Sum of Factors of 21?
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