A084373 - OEIS

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A084373

Numbers k such that smallest digit of k = total number of divisors of k.

1, 2, 23, 29, 46, 68, 74, 76, 88, 94, 223, 227, 229, 233, 239, 257, 263, 269, 277, 283, 293, 445, 446, 447, 454, 458, 466, 469, 478, 485, 489, 497, 523, 545, 554, 649, 668, 674, 694, 727, 745, 746, 749, 794, 796, 823, 827, 829, 849, 867, 929, 949, 974, 2237

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

94 is a term because it has 4 divisors [1, 2, 47, 94] and its smallest digit is 4.

MATHEMATICA

Select[Range[3000], DivisorSigma[0, #]==Min[IntegerDigits[#]]&] (* Harvey P. Dale, Nov 26 2014 *)

CROSSREFS

Cf. A054054, A000005.

Sequence in context: A208325 A255564 A034843 * A107148 A062653 A208272