A087005 Divisors of 2310.

1, 2, 3, 5, 6, 7, 10, 11, 14, 15, 21, 22, 30, 33, 35, 42, 55, 66, 70, 77, 105, 110, 154, 165, 210, 231, 330, 385, 462, 770, 1155, 2310

Offset: 1

Author

Reinhard Zumkeller, Jul 29 2003

Keywords

• nonn
• fini
• full
• easy

Comments

2310 = 11# = A002110(5);

divisors of 2310 are squarefree (A005117) and 11-smooth;

a(A000005(2310)) = a(32) = 2310 is the last term.

Links

• Index entries for sequences related to divisors of numbers
• Eric Weisstein's World of Mathematics, Primorial
• Eric Weisstein's World of Mathematics, Divisor

Crossrefs

Cf. A018255, A018336, A087006, A087007, A087008.

Programs

Mathematica

squarefrees[s_List] := Block[{a = Subsets[s]}, SortBy[Table[
Product[a[[n, m]], {m, 1, Length[a[[n]]]}], {n, 1, Length[a]}], Abs[#] &]]
A087005 = squarefrees[Prime[Range[5]]](* Fred Daniel Kline, Jan 25 2015 *)
Divisors[2310] (* Harvey P. Dale, Jun 27 2020 *)

PARI

divisors(2310) \\ Charles R Greathouse IV, Jun 21 2017