OFFSET
1,1
LINKS
Amiram Eldar, Table of n, a(n) for n = 1..10000
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