Numbers that have a record number of (1+phi)-divisors (A061389).

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =30a(5) =96a(6) =120a(7) =210a(8) =480a(9) =840a(10) =1920a(11) =2310a(12) =3360a(13) =9240a(14) =13440a(15) =30030a(16) =36960a(17) =120120a(18) =147840a(19) =332640a(20) =480480a(21) =1330560a(22) =1921920a(23) =4324320a(24) =8168160a(25) =17297280a(26) =30750720a(27) =32672640a(28) =73513440a(29) =155195040