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A034843
Number of divisors = first digit.
1
1, 2, 23, 29, 46, 63, 68, 88, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 361, 403, 407, 411, 413, 415, 417, 422, 427, 437, 445, 446, 447, 451, 453, 454, 458, 466, 469, 471, 473, 478, 481, 482, 485, 489, 493, 497, 603, 604
OFFSET
1,2
LINKS
MATHEMATICA
Select[Range[700], DivisorSigma[0, #]==IntegerDigits[#][[1]]&] (* Harvey P. Dale, Aug 04 2021 *)
CROSSREFS
Sequence in context: A235148 A208325 A255564 * A084373 A107148 A062653
KEYWORD
nonn,base
EXTENSIONS
1 prepended. - R. J. Mathar, Jul 26 2015
STATUS
approved