A225239 -id:A225239 - cp's OEIS frontend

A225369 Values of the multiplier k arising from A225239.

1, 2, 4, 6, 6, 6, 6, 8, 10, 10, 12, 12, 12, 12, 12, 12, 12, 12, 14, 16, 18, 18, 18, 18, 20, 20, 20, 22, 22, 24, 24, 24, 24, 24, 28, 28, 28, 28, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 6, 32, 32, 6, 6, 6, 6, 6, 6, 6, 6, 6, 34, 6, 6, 6, 6, 6, 6, 6, 36, 6

Offset: 1

N. J. A. Sloane, May 07 2013

nonn

Rémy Sigrist, Table of n, a(n) for n = 1..500 (based on Donovan Johnson's b-file for A225239)

Cf. A225239.

More terms from Rémy Sigrist, Nov 10 2020

A225362 Numbers n with the property that there are integers k, h such that sigma(n) = k^tau(n) = tau(n)^h.

Original entry on oeis.org

1, 3, 217, 3937, 57337, 917497, 1040257, 11010027, 12189603, 16252897, 16646017, 3612185689, 4294434817, 66571993057, 68718821377, 17590038552577, 270545999761249, 281472829095937, 16138807601873739769, 16140901064495857657, 292842062170139131777, 1208766717309082486038529

Offset: 1

Jaroslav Krizek, May 05 2013

nonn

Intersection of A225239 and A051281.

			3937 is a term because sigma(3937) = 4096 = 8^tau(3937) = 8^4 = tau(3937)^6 = 4^6; k = 8, h = 6.

Cf. A000005 (tau=number of divisors), A000203 (sigma=sum of divisors).

Cf. A225239, A051281.

More terms, using A051281 b-file, from Michel Marcus, Feb 19 2020

cp's OEIS Frontend

A225369 Values of the multiplier k arising from A225239.

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