OFFSET
1,1
COMMENTS
Numbers of the forms p^47, p^23*q^1, p^15*q^2, p^11*q^3, p^7*q^5, p^3*q^3*r^2, p^7*q^2*r^1, p^11*q^1*r^1, p^5*q^3*r^1, p^5*q^1*r^1*s^1, p^3*q^2*r^1*s^1 and p^2*q^1*r^1*s^1*t^1, where p, q, r, s and t 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))=48.
MATHEMATICA
Select[Range[20000], DivisorSigma[0, #]==48&] (* Vladimir Joseph Stephan Orlovsky, May 06 2011 *)
PROG
(PARI) is(n)=numdiv(n)==48 \\ Charles R Greathouse IV, Jun 19 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Aug 27 2010
STATUS
approved