A105442 Numbers with at least two odd prime factors (not necessarily distinct) such that in binary representation all divisors of n are contained in n.

55, 215, 407, 1403, 1681, 3223, 3362, 3415, 6724, 13448, 13655, 15487, 25751, 80089, 146621, 160178, 218455, 237169, 320356, 445663, 464711, 474338, 873815, 948676, 1662743, 1897352, 1932377, 1975531, 2484187, 3223001, 3410639, 3872639

Offset: 1

Author

Reinhard Zumkeller, Apr 09 2005

Keywords

• nonn

Comments

Intersection of A093641 and A105441;

A087436(a(n)) > 1.

Crossrefs

Cf. A093642, A093641.