OFFSET
1,6
LINKS
Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
EXAMPLE
n = 40 = 5*2^3, rad(40) = 10: a(40) = #{d:d<10} = #{1,2,4,5,8} = 5.
MATHEMATICA
a[n_] := DivisorSum[n, 1 &, # < Times @@ FactorInteger[n][[;; , 1]] &]; Array[a, 100] (* Amiram Eldar, Jul 09 2022 *)
PROG
(Haskell)
a095960 n = length [x | x <- a027750_row n, x < a007947 n]
-- Reinhard Zumkeller, Sep 10 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jul 14 2004
STATUS
approved