Numbers k such that the sum of the divisors of k is divisible by the number of divisors of k, and the sum of the squares of the divisors of k is divisible by the sum of the divisors of k.
A277553
Numbers k such that the sum of the divisors of k is divisible by the number of divisors of k, and the sum of the squares of the divisors of k is divisible by the sum of the divisors of k.
Terms
- a(0) =1a(1) =20a(2) =49a(3) =169a(4) =361a(5) =500a(6) =605a(7) =961a(8) =980a(9) =1025a(10) =1369a(11) =1445a(12) =1700a(13) =1849a(14) =2645a(15) =3380a(16) =3721a(17) =4205a(18) =4352a(19) =4489a(20) =4693a(21) =5329a(22) =6241a(23) =7220a(24) =8228a(25) =8281a(26) =8405a(27) =9409a(28) =9425a(29) =10609
External references
- oeis: A277553