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Smith numbers

A Smith number is a composite number whose digit sum equals the sum of the digits of its prime factors counted with multiplicity.

The first few smith numbers are: 4, 22, 27, 58, 85, 94, 121, 166, 202, 265, 274, 319, …

29,928 of the first one million positive integers are smith.

Learn more about smith numbers on wikipedia.

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