Numbers k that have a record number of divisors d such that gcd(d, k/d) is a square.

A377707

Numbers k that have a record number of divisors d such that gcd(d, k/d) is a square.

Terms

    a(0) =1a(1) =2a(2) =6a(3) =30a(4) =210a(5) =1680a(6) =2310a(7) =18480a(8) =30030a(9) =240240a(10) =480480a(11) =3843840a(12) =4084080a(13) =8168160a(14) =65345280a(15) =77597520a(16) =155195040a(17) =1241560320a(18) =1784742960a(19) =3569485920a(20) =28555887360a(21) =51757545840a(22) =103515091680a(23) =828120733440

External references