Q: What is the sum of all factors of the number 21,906 excluding 21,906?

 A: 25,596

Why is 25,596 the sum of all factors of 21,906, excluding 21,906?

The factors of the number 21,906 are: 1, 2, 3, 6, 9, 18, 1217, 2434, 3651, 7302, 10953, 21906.

If you add them up, you will get the total of 21,931. Now subtract 21,906 to get 25,596


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