OFFSET
1,1
MATHEMATICA
Select[Range[180], DivisorSigma[0, #] * DivisorSigma[1, #] > # * EulerPhi[#] &] (* Amiram Eldar, Jun 12 2022 *)
PROG
(PARI) is(k) = {my(f=factor(k)); numdiv(k)*sigma(k) > k*eulerphi(k); } \\ Jinyuan Wang, Apr 05 2020
CROSSREFS
KEYWORD
nonn,easy,fini,full
AUTHOR
Benoit Cloitre, Mar 26 2002
STATUS
approved