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Harshad numbers

A Harshad number is a positive integer that is divisible by the sum of its decimal digits.

The first few harshad numbers are: 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, …

95,427 of the first one million positive integers are harshad.

Learn more about harshad numbers on wikipedia.

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