Odd solutions of $\sigma(n)-2n=2$ have at least six distinct prime factors

DOI10.5486/PMD.2013.5125zbMath1286.11006OpenAlexW2335108671MaRDI QIDQ5414357

Lianrong Ma, Yan Li, Jun Hua Zhang

Publication date: 5 May 2014

Published in: Publicationes Mathematicae Debrecen (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.5486/pmd.2013.5125

zbMATH Keywords

perfect numberabundant numbernear-perfect numberdeficient numberprimitive abundant number

Mathematics Subject Classification ID

Arithmetic functions; related numbers; inversion formulas (11A25)

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