Q: What is the sum of all factors of the number 18,090 excluding 18,090?

 A: 30,870

Why is 30,870 the sum of all factors of 18,090, excluding 18,090?

The factors of the number 18,090 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 67, 90, 134, 135, 201, 270, 335, 402, 603, 670, 1005, 1206, 1809, 2010, 3015, 3618, 6030, 9045, 18090.

If you add them up, you will get the total of 18,120. Now subtract 18,090 to get 30,870


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