Numbers k such that phi(k)*d(k) is a multiple of sigma(k), where d(k) is the number of divisors of k.

A050934

Numbers k such that phi(k)*d(k) is a multiple of sigma(k), where d(k) is the number of divisors of k.

Terms

    a(0) =1a(1) =3a(2) =14a(3) =35a(4) =42a(5) =105a(6) =209a(7) =248a(8) =297a(9) =418a(10) =594a(11) =627a(12) =744a(13) =1045a(14) =1254a(15) =1485a(16) =1736a(17) =2926a(18) =3135a(19) =3339a(20) =3596a(21) =3689a(22) =3956a(23) =4064a(24) =4158a(25) =5208a(26) =5396a(27) =5890a(28) =6461a(29) =7315

External references