Q: What is the sum of all factors of the number 212,440 excluding 212,440?

 A: 280,040

Why is 280,040 the sum of all factors of 212,440, excluding 212,440?

The factors of the number 212,440 are: 1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 113, 188, 226, 235, 376, 452, 470, 565, 904, 940, 1130, 1880, 2260, 4520, 5311, 10622, 21244, 26555, 42488, 53110, 106220, 212440.

If you add them up, you will get the total of 212,720. Now subtract 212,440 to get 280,040


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