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Number of divisors of A064040(n).
1

%I #13 Jun 22 2018 04:32:51

%S 4,4,6,4,4,6,6,4,4,8,4,6,8,4,4,4,9,4,4,8,8,6,6,4,10,6,4,6,8,4,8,4,4,

%T 12,4,6,4,8,6,4,8,12,4,6,6,4,8,10,4,12,4,4,4,8,12,4,6,4,4,4,12,6,6,9,

%U 8,8,8,4,12,8,4,10,8,4,6,6,4,4,16,4,4,6,12,4,8,12,4,4,8,8,8,12,4,4,4,15,4

%N Number of divisors of A064040(n).

%H Harry J. Smith, <a href="/A064041/b064041.txt">Table of n, a(n) for n = 1..1000</a>

%e a(17) = 9 since 36 is the 17th number with prime number of prime divisors and 36 is divisible by 9 numbers.

%o (PARI) { n=0; for (m=1, 10^9, if (isprime(omega(m)), write("b064041.txt", n++, " ", numdiv(m)); if (n==1000, break)) ) } \\ _Harry J. Smith_, Sep 06 2009

%Y Cf. A064040.

%K nonn

%O 1,1

%A _Lior Manor_, Aug 23 2001