Odd numbers m such that there exists no k for which the denominator of d(k)/k = m where d(k) is the number of divisors of k (A000005).

A353320

Odd numbers m such that there exists no k for which the denominator of d(k)/k = m where d(k) is the number of divisors of k (A000005).

Terms

    a(0) =243a(1) =625a(2) =1875a(3) =3969a(4) =4375a(5) =5625a(6) =6875a(7) =8125a(8) =9801a(9) =10625a(10) =11875a(11) =13125a(12) =13689a(13) =14375a(14) =18125a(15) =19375a(16) =19845a(17) =20625a(18) =23125a(19) =23409a(20) =24375a(21) =25625a(22) =26875a(23) =29241a(24) =29375a(25) =30625a(26) =31875a(27) =33125a(28) =35625a(29) =36875

External references