What is the Sum of Factors of 21?

The Sum of Factors of 21 means that you add up all the factors of 21. You may be looking for the Sum of Factors of 21 including or excluding 21 itself.

Here is the calculation and answer to the Sum of all Factors of 21 including 21:

1 + 3 + 7 + 21 = 32

Here is the calculation and answer to the Sum of Factors of 21 if you exclude 21 itself:

1 + 3 + 7 = 11

Sum of Factors Calculator
Do you want to calculate the Sum of Factors for another number? Enter another number below!

What is the Sum of Factors of 22?
The Sum of Factors of 21 is not the only calculation we did! Go here for the next calculation.