Record values of gcd(sigma(n), phi(n)) (A009223).

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =8a(5) =24a(6) =48a(7) =72a(8) =120a(9) =192a(10) =240a(11) =336a(12) =720a(13) =960a(14) =1440a(15) =1872a(16) =2016a(17) =2880a(18) =3360a(19) =4032a(20) =5760a(21) =6720a(22) =6912a(23) =7392a(24) =8640a(25) =10080a(26) =17280a(27) =20160a(28) =34560a(29) =40320