%N a(n) = the number of divisors of n that are each one more than a power of a prime.
%C 1 is considered here to be a power of a prime. 0 is not considered here to be a power of a prime.
%H Diana Mecum, <a href="/A141198/b141198.txt">Table of n, a(n) for n = 1..1049</a>
%e The divisors of 9 are 1,3,9. 1 is one more than 0, not a power of a prime. 3 is one more than 2, a power of a prime. And 9 is one more than 8, a power of a prime. There are therefore 2 such divisors that are each one more than a power of a prime. So a(9)=2.
%Y Cf. A141197.
%A _Leroy Quet_, Jun 12 2008
%E Corrected and extended by _Diana L. Mecum_, Jul 05 2007