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A083914 Number of divisors of n that are congruent to 4 modulo 10. 10
0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 2, 0, 0, 0, 2, 0, 0, 0, 1, 0, 1, 0, 2, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 2, 0, 1, 0, 2, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 3, 0, 0, 0, 2, 0, 0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 2, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,24

COMMENTS

a(n) = A000005(n) - A083910(n) - A083911(n) - A083912(n) - A083913(n) - A083915(n) - A083916(n) - A083917(n) - A083918(n) - A083919(n).

LINKS

Table of n, a(n) for n=1..105.

MATHEMATICA

Table[Count[Divisors[n], _?(Mod[#, 10]==4&)], {n, 110}] (* Harvey P. Dale, Dec 09 2014 *)

CROSSREFS

Cf. A010879, A000005, A001227.

Sequence in context: A227344 A130207 A167688 * A083891 A087623 A265260

Adjacent sequences:  A083911 A083912 A083913 * A083915 A083916 A083917

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 08 2003

STATUS

approved

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Last modified October 22 13:06 EDT 2018. Contains 316459 sequences. (Running on oeis4.)