The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A007592

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A007592

Hyperperfect numbers: k = m*(sigma(k) - k - 1) + 1 for some m > 1.
(history; published version)

#43 by Michael De Vlieger at Thu Dec 16 22:32:00 EST 2021

STATUS

reviewed

approved

#42 by Michael De Vlieger at Thu Dec 16 22:31:56 EST 2021

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proposed

reviewed

#41 by Jon E. Schoenfield at Thu Dec 16 22:16:50 EST 2021

STATUS

editing

proposed

#40 by Jon E. Schoenfield at Thu Dec 16 22:16:49 EST 2021

NAME

Hyperperfect numbers: n k = m*(sigma(nk) -n k - 1) + 1 for some m > 1.

AUTHOR

N. J. A. Sloane.

STATUS

approved

editing

#39 by Peter Luschny at Sat Jun 11 09:45:49 EDT 2016

STATUS

reviewed

approved

#38 by Joerg Arndt at Sat Jun 11 02:44:16 EDT 2016

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proposed

reviewed

#37 by Michel Marcus at Sat Jun 11 02:39:23 EDT 2016

STATUS

editing

proposed

#36 by Michel Marcus at Sat Jun 11 02:39:13 EDT 2016

REFERENCES

D. Minoli and Robert Bear, Hyperperfect Numbers, Pi Mu Epsilon Journal, Fall 1975, pp. 153-157.

LINKS

D. Minoli and Robert Bear, <a href="http://www.pme-math.org/journal/issues/PMEJ.Vol.6.No.3.pdf">Hyperperfect Numbers</a>, Pi Mu Epsilon Journal, Fall 1975, pp. 153-157.

Herman J. J. te Riele, <a href="http://dx.doi.org/10.1090/S0025-5718-1981-0595066-9">Hyperperfect numbers with three different prime factors</a>, Math. Comp. 36 (1981), 297-298.

STATUS

approved

editing

#35 by Bruno Berselli at Fri Mar 11 07:57:21 EST 2016

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proposed

approved

#34 by Michel Marcus at Fri Mar 11 07:02:04 EST 2016

STATUS

editing

proposed