%0 Journal Article %A Paul Erdös %T Remarks on number theory II. Some problems on the σ function %J Acta Arithmetica %D 1959 %P 171-177 %V 5 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-5-2-171-177/ %R 10.4064/aa-5-2-171-177 %G en %F 10_4064_aa_5_2_171_177