Q: What is the sum of all factors of the number 1,200 excluding 1,200?

 A: 2,644

Why is 2,644 the sum of all factors of 1,200, excluding 1,200?

The factors of the number 1,200 are: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 25, 30, 40, 48, 50, 60, 75, 80, 100, 120, 150, 200, 240, 300, 400, 600, 1200.

If you add them up, you will get the total of 1,202. Now subtract 1,200 to get 2,644


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