1,2

1664338*sigma(1664338)=1664338*2688588=4474719174744.

Cf. A084122, A115891, A115892.

Sequence in context: A093887 A140898 A120814 this_sequence A101827 A103207 A093002

Adjacent sequences: A115887 A115888 A115889 this_sequence A115891 A115892 A115893

nonn,base

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006