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Numbers n such that tau(n)^2 > phi(n).
1

%I #14 Jul 11 2019 19:20:10

%S 2,3,4,6,8,9,10,12,14,15,16,18,20,21,22,24,26,28,30,32,36,40,42,44,45,

%T 48,50,52,54,56,60,64,66,68,70,72,78,80,84,88,90,96,100,102,104,105,

%U 108,110,112,114,120,126,130,132,138,140,144,150,154,156,160,162,168

%N Numbers n such that tau(n)^2 > phi(n).

%H Ivan Neretin, <a href="/A068577/b068577.txt">Table of n, a(n) for n = 1..396</a> (full sequence)

%t Select[Range[170], DivisorSigma[0, #]^2 > EulerPhi[#] &] (* _Ivan Neretin_, Oct 16 2016 *)

%K easy,nonn,fini,full

%O 1,1

%A _Benoit Cloitre_, Mar 26 2002