A variation on perfect numbers.
Woodford, Roger
Integers, Tome 4 (2004), / Harvested from The Electronic Library of Mathematics
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Publié le : 2004-01-01
EUDML-ID : urn:eudml:doc:125919 
@article{02124083,
     title = {A variation on perfect numbers.},
     journal = {Integers},
     volume = {4},
     year = {2004},
     zbl = {1086.11007},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02124083}
}

Woodford, Roger. A variation on perfect numbers.. Integers, Tome 4 (2004) . http://gdmltest.u-ga.fr/item/02124083/