Numbers k such that sigma(k) = phi(k)*(sum of the digits of k).

Terms

a(0) =1a(1) =6a(2) =3720a(3) =25080a(4) =237000a(5) =353430a(6) =1201560a(7) =1402440a(8) =2104440a(9) =2147040a(10) =4140360a(11) =22007160a(12) =60035220a(13) =104370420a(14) =110095020a(15) =136222020a(16) =402500280a(17) =2203551000a(18) =2223003120a(19) =8720021310a(20) =35590401000a(21) =110232105060a(22) =116046010080a(23) =212062116000a(24) =440401221000