Q: What is the sum of all factors of the number 21,720 including 21,720?

 A: 65,520

Why is 65,520 the sum of all factors of 21,720, including 21,720?

The factors of the number 21,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 181, 362, 543, 724, 905, 1086, 1448, 1810, 2172, 2715, 3620, 4344, 5430, 7240, 10860, 21720.

If you add them up, you will get the total of 65,520.


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