Q: What is the sum of all factors of the number 309,280 excluding 309,280?

 A: 421,772

Why is 421,772 the sum of all factors of 309,280, excluding 309,280?

The factors of the number 309,280 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 1933, 3866, 7732, 9665, 15464, 19330, 30928, 38660, 61856, 77320, 154640, 309280.

If you add them up, you will get the total of 309,701. Now subtract 309,280 to get 421,772


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