Numbers m such that sigma(Product(p_j)) = sigma(Product(e_j)), where m = Product((p_i)^e_i) and sigma = A000203.

A272859

Numbers m such that sigma(Product(p_j)) = sigma(Product(e_j)), where m = Product((p_i)^e_i) and sigma = A000203.

Terms

    a(0) =1a(1) =4a(2) =27a(3) =72a(4) =108a(5) =192a(6) =800a(7) =1458a(8) =3125a(9) =5120a(10) =6144a(11) =6272a(12) =10976a(13) =12500a(14) =21600a(15) =30375a(16) =36000a(17) =48600a(18) =54675a(19) =77760a(20) =84375a(21) =114688a(22) =116640a(23) =121500a(24) =134456a(25) =138240a(26) =169344a(27) =173056a(28) =225000a(29) =229376

External references