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Arithmetic number

An arithmetic number is an integer for which the average of its positive divisors is also an integer.

 


Explanation

The number 6 is an arithmetic number because (1 + 2 + 3 + 6) / 4 = 3. However the number 2 is not an arithmetic number because (1 + 2) / 2 = 1.5 which is a fraction.

 


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