Q: What is the sum of all factors of the number 261,640 excluding 261,640?

 A: 348,920

Why is 348,920 the sum of all factors of 261,640, excluding 261,640?

The factors of the number 261,640 are: 1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 211, 248, 310, 422, 620, 844, 1055, 1240, 1688, 2110, 4220, 6541, 8440, 13082, 26164, 32705, 52328, 65410, 130820, 261640.

If you add them up, you will get the total of 261,988. Now subtract 261,640 to get 348,920


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