A133031 Triangle read by rows: row n lists divisors of n-th perfect number A000396(n).

1, 2, 3, 6, 1, 2, 4, 7, 14, 28, 1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 1, 2, 4, 8, 16, 32, 64, 127, 254, 508, 1016, 2032, 4064, 8128, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8191, 16382, 32764, 65528, 131056, 262112, 524224, 1048448, 2096896

Offset: 1

Author

Omar E. Pol, Oct 26 2007

Keywords

• nonn
• tabf

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..5000
• Omar E. Pol, Determinacion geometrica de los numeros primos y perfectos.

Crossrefs

Cf. A018254, A018487, A027750. Perfect numbers: A000396.

Programs

Mathematica

Divisors[PerfectNumber[Range[5]]]//Flatten (* Harvey P. Dale, Jul 29 2024 *)