Why is 84,000 the sum of all factors of 39,980, including 39,980?
The factors of the number 39,980 are: 1, 2, 4, 5, 10, 20, 1999, 3998, 7996, 9995, 19990, 39980.
If you add them up, you will get the total of 84,000.
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