Q: What is the sum of all factors of the number 128 excluding 128?

 A: 127

Why is 127 the sum of all factors of 128, excluding 128?

The factors of the number 128 are: 1, 2, 4, 8, 16, 32, 64, 128.

If you add them up, you will get the total of 255. Now subtract 128 to get 127


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