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Jul 20, 2012 at 13:30 comment added joro @Gerry OEIS doesn't consider 4-perfect numbers finite anymore (no "fini" keyword) oeis.org/A027687.
Jul 18, 2012 at 0:32 comment added Gerry Myerson @joro, the goto page for multiply-perfect numbers is wwwhomes.uni-bielefeld.de/achim/mpn.html
Jul 15, 2012 at 15:46 comment added joro Do you know other than OEIS reference for this? (Some sources claim this is a conjecture).
Jul 8, 2012 at 22:47 history answered Gerry Myerson CC BY-SA 3.0