Q: What is the sum of all factors of the number 421,005 excluding 421,005?

 A: 353,139

Why is 353,139 the sum of all factors of 421,005, excluding 421,005?

The factors of the number 421,005 are: 1, 3, 5, 13, 15, 17, 39, 51, 65, 85, 127, 195, 221, 255, 381, 635, 663, 1105, 1651, 1905, 2159, 3315, 4953, 6477, 8255, 10795, 24765, 28067, 32385, 84201, 140335, 421005.

If you add them up, you will get the total of 421,358. Now subtract 421,005 to get 353,139


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