Q: What is the sum of all factors of the number 172 excluding 172?

 A: 136

Why is 136 the sum of all factors of 172, excluding 172?

The factors of the number 172 are: 1, 2, 4, 43, 86, 172.

If you add them up, you will get the total of 308. Now subtract 172 to get 136


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