A138815 Divisors of 16775168 (half the 5th perfect number).

1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 8191, 16382, 32764, 65528, 131056, 262112, 524224, 1048448, 2096896, 4193792, 8387584, 16775168

Offset: 1

Author

Omar E. Pol, Mar 31 2008

Keywords

• easy
• fini
• full
• nonn

Comments

The n-th perfect number divided by 2 (A133028(n)) has 2*A090748(n) divisors, then this sequence has 24 members. First 12 members are the first 12 powers of 2 A000079. Last 12 members are multiples of 5th Mersenne prime A000668(5)=8191. a(n) written in base 2 has n digits. See A138825 for the structure of this sequence.

Links

• Index entries for sequences related to divisors of numbers

Crossrefs

Perfect number divided by 2: A133028. Cf. A000043, A000079, A000396, A000668, A090748, A134708, A135655, A138825.

Programs

Mathematica

Divisors[16775168] (* Wesley Ivan Hurt, Mar 20 2022 *)

PARI

divisors(16775168) \\ Charles R Greathouse IV, Jun 22 2017