Q: What is the sum of all factors of the number 13,780,820 excluding 13,780,820?

 A: 15,158,944

Why is 15,158,944 the sum of all factors of 13,780,820, excluding 13,780,820?

The factors of the number 13,780,820 are: 1, 2, 4, 5, 10, 20, 689041, 1378082, 2756164, 3445205, 6890410, 13780820.

If you add them up, you will get the total of 13,780,835. Now subtract 13,780,820 to get 15,158,944


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