A138824 Divisors of 4064 (the 4th perfect number divided by 2), written in base 2.

1, 10, 100, 1000, 10000, 100000, 1111111, 11111110, 111111100, 1111111000, 11111110000, 111111100000

Offset

1,2

Comments

a(n) has n digits. See A138814 for more information.

Links

Table of n, a(n) for n=1..12.

Index entries for sequences related to divisors of numbers

Example

The structure of divisors of 4064 (see A138814)
.................................................................
n ........... Divisor . Formula ....... Divisor written in base 2
.................................................................
1) ................ 1 = 2^0 ........... 1
2) ................ 2 = 2^1 ........... 10
3) ................ 4 = 2^2 ........... 100
4) ................ 8 = 2^3 ........... 1000
5) ............... 16 = 2^4 ........... 10000
6) A134708(4) = .. 32 = 2^5 ........... 100000
7) A000668(4) = . 127 = 2^7 - 2^0 ..... 1111111
8) .............. 254 = 2^8 - 2^1 ..... 11111110
9) .............. 508 = 2^9 - 2^2 ..... 111111100
10) ............ 1016 = 2^10- 2^3 ..... 1111111000
11) ............ 2032 = 2^11- 2^4 ..... 11111110000
12) A133028(4) = 4064 = 2^12- 2^5 ..... 111111100000

Mathematica

FromDigits/@(IntegerDigits[#, 2]&/@Divisors[4064]) (* Harvey P. Dale, Oct 12 2016 *)

Crossrefs

Perfect number divided by 2: A133028. Cf. A000043, A000396, A000668, A090748, A134708, A135654, A138814.

Sequence in context: A290668 A290553 A290299 * A273495 A267044 A266445

Adjacent sequences: A138821 A138822 A138823 * A138825 A138826 A138827

Keyword

easy,fini,full,nonn,less

Author

Omar E. Pol, Mar 31 2008

Status

approved