Numbers n = concat(s,t) such that n = sigma(s*t), where sigma(x) is the sum of the divisors of x.

Terms

a(0) =124a(1) =2352a(2) =2604a(3) =6804a(4) =15240a(5) =63180a(6) =225302a(7) =632400a(8) =1531152a(9) =2537040a(10) =4592588a(11) =7160400a(12) =7603680a(13) =26100144a(14) =26378352a(15) =31492032a(16) =33747840a(17) =49447728a(18) =88385040a(19) =104941200a(20) =162496048a(21) =175600040a(22) =197499456a(23) =403242624a(24) =483741216a(25) =797091840a(26) =2077442640a(27) =2942021520a(28) =4045874976a(29) =4828299840