Q: What is the sum of all factors of the number 21,287,007 excluding 21,287,007?

 A: 14,355,873

Why is 14,355,873 the sum of all factors of 21,287,007, excluding 21,287,007?

The factors of the number 21,287,007 are: 1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4759, 14277, 33313, 42831, 99939, 299817, 337889, 1013667, 2365223, 3041001, 7095669, 21287007.

If you add them up, you will get the total of 21,287,021. Now subtract 21,287,007 to get 14,355,873


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