Q: What is the sum of all factors of the number 281,920 excluding 281,920?

 A: 390,164

Why is 390,164 the sum of all factors of 281,920, excluding 281,920?

The factors of the number 281,920 are: 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 881, 1762, 3524, 4405, 7048, 8810, 14096, 17620, 28192, 35240, 56384, 70480, 140960, 281920.

If you add them up, you will get the total of 282,310. Now subtract 281,920 to get 390,164


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