A336358 Sigma(k) has at least the same number of distinct prime factors as k.

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

Offset: 1

Author

Antti Karttunen, Jul 20 2020

Keywords

• nonn

Comments

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

Crossrefs

Cf. A336357 (complement).

Cf. A000203, A001221, A058062.

Cf. also A336360.

Programs

PARI

isA336358(n) = (omega(sigma(n))>=omega(n));