OFFSET
1,2
COMMENTS
a(n) has n digits. See A138815 for more information.
EXAMPLE
The structure of divisors of 16775168 (see A138815)
.....................................................................
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) ................... 32 = 2^5 ........... 100000
7) ................... 64 = 2^6 ........... 1000000
8) .................. 128 = 2^7 ........... 10000000
9) .................. 256 = 2^8 ........... 100000000
10) ................. 512 = 2^9 ........... 1000000000
11) ................ 1024 = 2^10 .......... 10000000000
12) A134708(5) = ... 2048 = 2^11 .......... 100000000000
13) A000668(5) = ... 8191 = 2^13 - 2^0 .... 1111111111111
14) ............... 16382 = 2^14 - 2^1 .... 11111111111110
15) ............... 32764 = 2^15 - 2^2 .... 111111111111100
16) ............... 65528 = 2^16 - 2^3 .... 1111111111111000
17) .............. 131056 = 2^17 - 2^4 .... 11111111111110000
18) .............. 262112 = 2^18 - 2^5 .... 111111111111100000
19) .............. 524224 = 2^19 - 2^6 .... 1111111111111000000
20) ............. 1048448 = 2^20 - 2^7 .... 11111111111110000000
21) ............. 2096896 = 2^21 - 2^8 .... 111111111111100000000
22) ............. 4193792 = 2^22 - 2^9 .... 1111111111111000000000
23) ............. 8387584 = 2^23 - 2^10 ... 11111111111110000000000
24) A133028(5) = 16775168 = 2^24 - 2^11 ... 111111111111100000000000
MATHEMATICA
FromDigits[IntegerDigits[#, 2]]&/@Divisors[16775168] (* Harvey P. Dale, May 26 2015 *)
CROSSREFS
KEYWORD
easy,fini,nonn,less
AUTHOR
Omar E. Pol, Mar 31 2008
STATUS
approved