scientific article; zbMATH DE number 4000017
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Publication:4726318
zbMath0617.10004MaRDI QIDQ4726318
Publication date: 1987
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
perfect numbersamicable numbersaliquot sequencesbi-unitary divisormultiperfect numbersbi-unitary analogues
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