Q: What is the sum of all factors of the number 287,320 excluding 287,320?

 A: 419,000

Why is 419,000 the sum of all factors of 287,320, excluding 287,320?

The factors of the number 287,320 are: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 653, 1306, 2612, 3265, 5224, 6530, 7183, 13060, 14366, 26120, 28732, 35915, 57464, 71830, 143660, 287320.

If you add them up, you will get the total of 287,739. Now subtract 287,320 to get 419,000


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