

A093993


Number of divisors of n with a prime digital sum.


0



0, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 3, 0, 3, 2, 2, 0, 2, 0, 3, 3, 2, 1, 3, 2, 1, 1, 3, 1, 4, 0, 3, 2, 2, 2, 3, 0, 2, 1, 3, 1, 5, 1, 2, 2, 2, 1, 4, 2, 4, 1, 2, 0, 2, 2, 4, 1, 3, 0, 6, 1, 1, 3, 3, 2, 3, 1, 2, 2, 5, 0, 3, 0, 2, 3, 3, 2, 2, 0, 4, 1, 2, 1, 6, 2, 2, 2, 2, 1, 4, 1, 3, 1, 3, 1, 5, 0, 5, 2, 5, 1, 4, 0, 3, 4
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OFFSET

1,6


LINKS



EXAMPLE

a(12)=3 because the divisors of 12 are: [1, 2, 3, 4, 6, 12] and 2, 3 and 1+2=3 are primes.
a(98)=5 because the divisors of 98 are: [1, 2, 7, 14, 49, 98] and 2, 7, 1+4=5, 4+9=13 and 9+8=17 are primes.


CROSSREFS



KEYWORD

base,easy,nonn


AUTHOR



STATUS

approved



