Q: What is the sum of all factors of the number 21,028 excluding 21,028?

A: 21,084

Why is 21,084 the sum of all factors of 21,028, excluding 21,028?

The factors of the number 21,028 are: 1, 2, 4, 7, 14, 28, 751, 1502, 3004, 5257, 10514, 21028.

If you add them up, you will get the total of 21,049. Now subtract 21,028 to get 21,084

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