Q: What is the sum of all factors of the number 1,421,890 excluding 1,421,890?

 A: 1,137,530

Why is 1,137,530 the sum of all factors of 1,421,890, excluding 1,421,890?

The factors of the number 1,421,890 are: 1, 2, 5, 10, 142189, 284378, 710945, 1421890.

If you add them up, you will get the total of 1,421,891. Now subtract 1,421,890 to get 1,137,530


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