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A065743
Smallest number with exactly A025475(n) divisors.
1
1, 6, 24, 36, 120, 1296, 900, 840, 46656, 7560, 44100, 60466176, 810000, 83160, 2176782336, 2822400, 1081080, 2821109907456, 729000000, 101559956668416, 17297280, 131621703842267136, 1944810000, 341510400
OFFSET
1,2
COMMENTS
Note that 2^(n-1) has n divisors. - David Wasserman, Sep 09 2002
LINKS
FORMULA
a(n) = A005179(A025475(n)).
MATHEMATICA
a = Table[ 0, {1024} ]; Do[ b = DivisorSigma[ 0, n]; If[ b < 1025 && a[[b]] == 0, a[[b]] = n], {n, 1, 10^8/2} ]; a[[ Select[ Range[2, 1024], !PrimeQ[ # ] && Mod[ #, # - EulerPhi[ # ]] == 0 & ] ]]
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Nov 15 2001
EXTENSIONS
More terms from David Wasserman, Sep 09 2002
STATUS
approved