Q: What is the sum of all factors of the number 1,100 excluding 1,100?

A: 1,504

Why is 1,504 the sum of all factors of 1,100, excluding 1,100?

The factors of the number 1,100 are: 1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100.

If you add them up, you will get the total of 1,101. Now subtract 1,100 to get 1,504

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