2,1
A. Flammenkamp, The Multiply Perfect Number Page
J. C. Moxham, Multiply perfect numbers
R. M. Sorli, Multiply perfect numbers
Cf. A007539, A007691.
Sequence in context: A052334 A154526 A126144 this_sequence A163637 A084424 A137978
Adjacent sequences: A071999 A072000 A072001 this_sequence A072003 A072004 A072005
hard,more,nonn
Lekraj Beedassy (blekraj(AT)yahoo.com), Jun 18 2002
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