Numbers m such that g(m) = (m * tau(m) / sigma(m)), h(m) = (m * sigma(m)) / tau(m) and k(m) = (tau(m) * sigma(m)) / m are all integers.

A333639

Numbers m such that g(m) = (m * tau(m) / sigma(m)), h(m) = (m * sigma(m)) / tau(m) and k(m) = (tau(m) * sigma(m)) / m are all integers.

Terms

    a(0) =1a(1) =6a(2) =672a(3) =1638a(4) =30240a(5) =32760a(6) =2178540a(7) =17428320a(8) =23569920a(9) =29410290a(10) =45532800a(11) =714954240a(12) =1379454720a(13) =14182439040a(14) =19209881600a(15) =30600708096a(16) =51001180160a(17) =57575890944a(18) =57629644800a(19) =153003540480a(20) =206166804480a(21) =403031236608a(22) =465036042240a(23) =482476262400

External references