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A063080
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n/d(n) is prime, where d(n) is the number of divisors of n.
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1
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8, 9, 12, 18, 24, 40, 56, 60, 84, 88, 104, 132, 136, 152, 156, 184, 204, 228, 232, 248, 276, 296, 328, 344, 348, 372, 376, 424, 444, 472, 488, 492, 516, 536, 564, 568, 584, 632, 636, 664, 708, 712, 732, 776, 804, 808, 824, 852, 856, 872, 876, 904, 948, 996
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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EXAMPLE
| n=18: 18/d(18) = 3 a prime.
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PROG
| (PARI) j=[]; for(n=1, 3000, if(Mod(n, numdiv(n))==0, if(isprime((n/numdiv(n))), j=concat(j, n)))); j
(PARI) { n=0; for (m=1, 10^9, if(m%(d=numdiv(m))==0 && isprime(m/d), write("b063080.txt", n++, " ", m); if (n==1000, break)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 17 2009]
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CROSSREFS
| Cf. A000005, A039819, A036762, A051278, A051279, A051280, A036763, A033950.
Sequence in context: A179443 A080756 A189833 * A167131 A109079 A050883
Adjacent sequences: A063077 A063078 A063079 * A063081 A063082 A063083
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KEYWORD
| easy,nonn
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AUTHOR
| Jason Earls (zevi_35711(AT)yahoo.com), Aug 05 2001
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