A060766 - OEIS

%I #15 Oct 16 2019 20:22:26

%S 1,2,2,4,3,6,4,6,15,10,6,12,35,10,8,16,9,18,10,28,99,22,12,20,143,18,

%T 42,28,60,30,16,88,255,28,18,36,323,130,60,40,21,42,154,60,483,46,24,

%U 42,75,238,234,52,27,132,84,304,783,58,60,60,899,84,32,104,165,66,442

%N Least common multiple of differences between consecutive divisors of n (ordered by size).

%H Harvey P. Dale, <a href="/A060766/b060766.txt">Table of n, a(n) for n = 2..1000</a>

%F a(n) = A290103(A328023(n)). - _Gus Wiseman_, Oct 16 2019

%e For n=98, divisors={1,2,7,14,49,98}; differences={1,5,7,35,49}; a(98) = LCM of differences = 245.

%t a[n_ ] := LCM@@(Drop[d=Divisors[n], 1]-Drop[d, -1])

%t Table[LCM@@Differences[Divisors[n]],{n,2,70}] (* _Harvey P. Dale_, Oct 08 2012 *)

%Y The GCD version appears to be A258409.

%Y The LCM of the prime indices of n is A290103(n).

%Y The differences between consecutive divisors of n are row n of A193829.

%Y Cf. A000005, A027750, A060680, A060681, A060683, A328023, A328026, A328219.

%K nonn

%O 2,2

%A _Labos Elemer_, Apr 24 2001

%E Edited by _Dean Hickerson_, Jan 22 2002