A088845 Multiply perfect numbers k for which the quotient sigma_5(k)/k = A001160(k)/k is nonintegral.

496, 523776, 23569920, 142990848, 275502900594021408, 622286506811515392, 71065075104190073088, 34384125938411324962897920, 41254809330254618094796800000, 2360137508360958913826987704320, 11990459635691909131039408128000, 24862223033124742964111030747136

Offset: 1

Author

Labos Elemer, Nov 05 2003

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..369

Crossrefs

Cf. A007691, A001158, A001160, A066269, A088843, A088844.

Programs

PARI

lista() = {v = readvec("b007691.txt"); for (i=1, #v, vi = v[i]; if (sigma(vi, 5) % vi, print1(vi, ", ");););} \\ Michel Marcus, Dec 26 2013

Extensions

Extended using A007691 b-file by Michel Marcus, Dec 26 2013

Data corrected by Amiram Eldar, May 09 2024