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A057531 Numbers n such that sum of digits of n equals the numbers of divisors of n. 8
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 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

[A007953(n)/A000005(n) = c] AND [A000005(n)/A007953(n) = c], c an integer. [From Ctibor O. Zizka (c.zizka(AT)email.cz), Jun 26 2009]

EXAMPLE

36 is a member as the sum of the digits of 36 is 3+6 = 9 and the number of divisors = 9.

MATHEMATICA

Select[ Range[ 1000 ], DivisorSigma[ 0, # ]==Plus@@IntegerDigits[ # ]& ] (from Harvey Dale)

CROSSREFS

Cf. A000005, A007953, A057532.

Sequence in context: A076206 A018563 A018590 * A018661 A018711 A018737

Adjacent sequences:  A057528 A057529 A057530 * A057532 A057533 A057534

KEYWORD

nonn,easy,base

AUTHOR

Asher Auel (asher.auel(AT)reed.edu) Sep 03 2000

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Last modified February 14 09:56 EST 2012. Contains 205614 sequences.