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A088240
Values associated with sequence A078511.
1
2, 12, 12, 16, 16, 18, 20, 24, 24, 24, 24, 28, 24, 24, 28, 32, 36, 36, 32, 32, 40, 36, 32, 32, 48, 48, 36, 36, 32, 48, 36, 48, 48, 32, 48, 30, 36, 48, 48, 40, 48, 36, 36, 48, 48, 40, 60, 40, 48, 48, 64, 40, 48, 48, 48, 64, 40, 48, 48, 36, 64, 48, 64, 60, 48, 48, 64, 60, 36, 48
OFFSET
1,1
LINKS
FORMULA
a(n) = A000005(A078511(n)) = A001414(A078511(n)).
MATHEMATICA
s = {}; Do[If[(d = DivisorSigma[0, n]) == Total[Times @@@ FactorInteger[n]], AppendTo[s, d]], {n, 2, 100000}]; s (* Amiram Eldar, Jun 22 2019 *)
PROG
(PARI) isA078511(n) = {my(f = factor(n)); sum(i=1, #f~, f[i, 1]*f[i, 2]) == numdiv(n); }
lista(nn) = for (n=1, nn, if (isA078511(n), print1(numdiv(n), ", "))); \\ Michel Marcus, Feb 11 2015
CROSSREFS
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Nov 03 2003
EXTENSIONS
More terms from Ray Chandler, Nov 05 2003
STATUS
approved