Numbers m such that A034448(m) = 3m/2, where A034448 = unitary sigma = sum of divisors d with gcd(d,m/d)=1.

A145681

Numbers m such that A034448(m) = 3m/2, where A034448 = unitary sigma = sum of divisors d with gcd(d,m/d)=1.

Terms

    a(0) =2a(1) =20a(2) =24a(3) =360a(4) =816a(5) =1056a(6) =12240a(7) =15840a(8) =29120a(9) =181632a(10) =2724480a(11) =9192960a(12) =13790400a(13) =15288000a(14) =93358848a(15) =199180800a(16) =1130734080a(17) =1400382720a(18) =25115166720a(19) =544161945600

External references