Numbers n such that the sum of the divisors of n divides sum of squares of divisors of n and number of divisors of n divides n.

A280353

Numbers n such that the sum of the divisors of n divides sum of squares of divisors of n and number of divisors of n divides n.

Terms

    a(0) =1a(1) =9a(2) =36a(3) =180a(4) =225a(5) =441a(6) =450a(7) =468a(8) =625a(9) =1089a(10) =1476a(11) =1521a(12) =1620a(13) =1800a(14) =2025a(15) =2178a(16) =2340a(17) =2601a(18) =3249a(19) =3600a(20) =4050a(21) =4500a(22) =4761a(23) =5202a(24) =5625a(25) =6561a(26) =7569a(27) =8100a(28) =8649a(29) =8712

External references