Q: What is the sum of all factors of the number 21,390,091 excluding 21,390,091?

 A: 1

Why is 1 the sum of all factors of 21,390,091, excluding 21,390,091?

The factors of the number 21,390,091 are: 1, 21390091.

If you add them up, you will get the total of 21,390,092. Now subtract 21,390,091 to get 1


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