Numbers m such that the arithmetic mean and the quadratic mean (the root mean square) of the divisors of m are both integers.

A327055

Numbers m such that the arithmetic mean and the quadratic mean (the root mean square) of the divisors of m are both integers.

Terms

    a(0) =1a(1) =7a(2) =41a(3) =239a(4) =287a(5) =1673a(6) =3055a(7) =6665a(8) =9545a(9) =9799a(10) =9855a(11) =21385a(12) =26095a(13) =34697a(14) =46655a(15) =66815a(16) =68593a(17) =68985a(18) =125255a(19) =155287a(20) =182665a(21) =242879a(22) =273265a(23) =380511a(24) =391345a(25) =404055a(26) =421655a(27) =627215a(28) =730145a(29) =814463

External references