Smallest numbers having exactly n divisors d>1 such that also d+1 is a divisor.

Terms

a(0) =1a(1) =6a(2) =12a(3) =72a(4) =60a(5) =180a(6) =360a(7) =420a(8) =840a(9) =1260a(10) =3780a(11) =2520a(12) =5040a(13) =13860a(14) =36960a(15) =41580a(16) =27720a(17) =55440a(18) =83160a(19) =166320a(20) =277200a(21) =491400a(22) =471240a(23) =360360a(24) =1113840a(25) =720720a(26) =1081080a(27) =3341520a(28) =2162160a(29) =2827440