OFFSET
1,2
MAPLE
numtheory[divisors](639); # Wesley Ivan Hurt, Apr 10 2017
MATHEMATICA
Divisors[639] (* Wesley Ivan Hurt, Sep 04 2022 *)
PROG
(PARI) divisors(639) \\ Charles R Greathouse IV, Jun 23 2017
CROSSREFS
KEYWORD
nonn,fini,full,easy
AUTHOR
STATUS
approved