Q: What is the sum of all factors of the number 21,972 excluding 21,972?

 A: 29,324

Why is 29,324 the sum of all factors of 21,972, excluding 21,972?

The factors of the number 21,972 are: 1, 2, 3, 4, 6, 12, 1831, 3662, 5493, 7324, 10986, 21972.

If you add them up, you will get the total of 22,001. Now subtract 21,972 to get 29,324


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