OFFSET
1,3
COMMENTS
Floor of mean of divisors of n. - Jon E. Schoenfield, Dec 24 2016
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
EXAMPLE
a(4)=2 since the 3 divisors of 4 are 1, 2 and 4 and floor((1 + 2 + 4)/3) = floor(7/3) = 2.
MATHEMATICA
Floor[Table[Total[Divisors[n]]/Length[Divisors[n]], {n, 20}]] (* Daniel Jolly, Nov 15 2014 *)
Table[Floor[DivisorSigma[1, n]/DivisorSigma[0, n]], {n, 70}] (* Harvey P. Dale, Jan 14 2015 *)
PROG
(Haskell)
a057022 n = a000203 n `div` a000005 n
-- Reinhard Zumkeller, Jan 06 2012
(PARI) a(n) = sigma(n)\numdiv(n); \\ Michel Marcus, Nov 15 2014
CROSSREFS
KEYWORD
nonn
AUTHOR
Henry Bottomley, Jul 21 2000
STATUS
approved