Nonunitary superperfect numbers: numbers k such that nusigma(nusigma(k)) = k, where nusigma(k) = sigma(k) - usigma(k) is the sum of nonunitary divisors of k (A048146).

A329884

Nonunitary superperfect numbers: numbers k such that nusigma(nusigma(k)) = k, where nusigma(k) = sigma(k) - usigma(k) is the sum of nonunitary divisors of k (A048146).

Terms

    a(0) =24a(1) =48a(2) =56a(3) =112a(4) =192a(5) =248a(6) =252a(7) =328a(8) =448a(9) =496a(10) =768a(11) =1016a(12) =1792a(13) =1984a(14) =2032a(15) =3240a(16) =6462a(17) =7936a(18) =8128a(19) =11616a(20) =11808a(21) =17412a(22) =20538a(23) =32512a(24) =49152a(25) =65528a(26) =114688a(27) =131056a(28) =507904a(29) =524224

External references