Numbers k such that sigma(k)^k divides k^sigma(k).

Terms

a(0) =1a(1) =6a(2) =28a(3) =84a(4) =120a(5) =364a(6) =420a(7) =496a(8) =672a(9) =840a(10) =1080a(11) =1320a(12) =1488a(13) =1782a(14) =2280a(15) =2760a(16) =3276a(17) =3360a(18) =3472a(19) =3480a(20) =3720a(21) =3780a(22) =5640a(23) =7080a(24) =7392a(25) =7440a(26) =7560a(27) =8128a(28) =8736a(29) =9240