Q: What is the sum of all factors of the number 257,878 excluding 257,878?

 A: 128,942

Why is 128,942 the sum of all factors of 257,878, excluding 257,878?

The factors of the number 257,878 are: 1, 2, 128939, 257878.

If you add them up, you will get the total of 258,006. Now subtract 257,878 to get 128,942


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