OFFSET
1,1
COMMENTS
Numbers of the form p^32 and p^10*q^2, where p and q are distinct primes.
LINKS
T. D. Noe, Table of n, a(n) for n = 1..1000
OEIS Wiki, Index entries for number of divisors
FORMULA
A000005(a(n)) = 33.
Sum_{n>=1} 1/a(n) = P(2)*P(10) - P(12) + P(32) = 0.000203328..., where P is the prime zeta function. - Amiram Eldar, Jul 03 2022
MATHEMATICA
Select[Range[2000000], DivisorSigma[0, #]==33&] (* Harvey P. Dale, Jan 26 2011 *)
PROG
(PARI) is(n)=numdiv(n)==33 \\ Charles R Greathouse IV, Jun 19 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Aug 27 2010
EXTENSIONS
More terms from Harvey P. Dale, Jan 26 2011
Extended by T. D. Noe, May 08 2011
STATUS
approved