Q: What is the sum of all factors of the number 1,920,009 excluding 1,920,009?

 A: 1,253,943

Why is 1,253,943 the sum of all factors of 1,920,009, excluding 1,920,009?

The factors of the number 1,920,009 are: 1, 3, 7, 13, 21, 39, 91, 169, 273, 507, 541, 1183, 1623, 3549, 3787, 7033, 11361, 21099, 49231, 91429, 147693, 274287, 640003, 1920009.

If you add them up, you will get the total of 1,920,010. Now subtract 1,920,009 to get 1,253,943


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