A338519 - OEIS

A338519

Integers that can be expressed as a product d*tau(d), where tau is the number of divisors function, in a single way.

1, 4, 6, 10, 12, 14, 22, 24, 26, 27, 32, 34, 38, 40, 46, 56, 58, 60, 62, 72, 74, 75, 80, 82, 84, 86, 88, 94, 104, 106, 118, 120, 122, 132, 134, 136, 140, 142, 146, 147, 152, 156, 158, 166, 168, 178, 184, 194, 202, 204, 206, 214, 218, 220, 226, 228, 232, 240, 248, 254

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OFFSET

1,2

COMMENTS

Integers m such that A327166(m) = 1.

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

PROG

(PARI) f(n) = sumdiv(n, d, d*numdiv(d) == n); \\ A327166

isok(n) = f(n)==1;

CROSSREFS

Cf. A000005, A038040, A327166, A338382.