A336358 - OEIS

%I #13 Jul 22 2020 14:15:28

%S 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,22,23,24,25,26,27,

%T 28,29,31,32,33,34,35,36,37,38,39,40,41,43,44,45,46,47,48,49,50,51,52,

%U 53,54,55,56,57,58,59,60,61,62,63,64,65,67,68,69,71,72,73,74,75,76,77,78,79,80,81,82,83,85

%N Sigma(k) has at least the same number of distinct prime factors as k.

%C Numbers k for which A058062(k) >= A001221(k).

%o (PARI) isA336358(n) = (omega(sigma(n))>=omega(n));

%Y Cf. A336357 (complement).

%Y Cf. A000203, A001221, A058062.

%Y Cf. also A336360.

%K nonn

%O 1,2

%A _Antti Karttunen_, Jul 20 2020