Numbers k such that Sum_{d|k} nphi(d) = k where the sum is over nonunitary divisors of k and nphi(k) is the nonunitary totient function (A254503).
A319800
Numbers k such that Sum_{d|k} nphi(d) = k where the sum is over nonunitary divisors of k and nphi(k) is the nonunitary totient function (A254503).
Terms
- a(0) =3960a(1) =5220a(2) =1873080a(3) =6733440a(4) =8447040a(5) =18685336320a(6) =255306083760a(7) =341863562880a(8) =357274165248a(9) =765899971200
External references
- oeis: A319800