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A057531
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Numbers whose sum of digits and number of divisors are equal.
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18
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1, 2, 11, 22, 36, 84, 101, 152, 156, 170, 202, 208, 225, 228, 288, 301, 372, 396, 441, 444, 468, 516, 525, 530, 602, 684, 710, 732, 804, 828, 882, 952, 972, 1003, 1016, 1034, 1070, 1072, 1106, 1111, 1164, 1236, 1304, 1308, 1425, 1472, 1476, 1521, 1524
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OFFSET
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1,2
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COMMENTS
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LINKS
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EXAMPLE
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36 is a term as the sum of the digits of 36 is 3+6 = 9 and the number of divisors is 9 too.
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MATHEMATICA
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Select[ Range[ 1000 ], DivisorSigma[ 0, # ]==Plus@@IntegerDigits[ # ]& ] (* Harvey P. Dale, Feb 19 2004 *)
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PROG
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See the Code Golf link.
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CROSSREFS
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KEYWORD
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nonn,easy,base
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AUTHOR
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Asher Auel (asher.auel(AT)reed.edu), Sep 03 2000
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STATUS
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approved
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