Numbers n = concat(s,t) such that sigma(n) - n = sigma(s) * sigma(t), where sigma(n) - n is the sum of the aliquot parts of n.

A271632

Numbers n = concat(s,t) such that sigma(n) - n = sigma(s) * sigma(t), where sigma(n) - n is the sum of the aliquot parts of n.

Terms

    a(0) =11a(1) =96a(2) =101a(3) =125a(4) =161a(5) =216a(6) =258a(7) =2754a(8) =5964a(9) =12978a(10) =14496a(11) =31408a(12) =430668a(13) =9660736a(14) =145873104a(15) =181699992a(16) =1140190416a(17) =4573227328a(18) =5927288640

External references