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Triangle read by rows: row n lists divisors of n-th perfect number A000396(n).
7

%I #8 Jul 29 2024 13:29:39

%S 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,

%T 127,254,508,1016,2032,4064,8128,1,2,4,8,16,32,64,128,256,512,1024,

%U 2048,4096,8191,16382,32764,65528,131056,262112,524224,1048448,2096896

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

%H Harvey P. Dale, <a href="/A133031/b133031.txt">Table of n, a(n) for n = 1..5000</a>

%H Omar E. Pol, <a href="http://www.polrpimos.com">Determinacion geometrica de los numeros primos y perfectos</a>.

%t Divisors[PerfectNumber[Range[5]]]//Flatten (* _Harvey P. Dale_, Jul 29 2024 *)

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

%K nonn,tabf

%O 1,2

%A _Omar E. Pol_, Oct 26 2007