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A018301
Divisors of 140.
0
1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
OFFSET
1,2
COMMENTS
There are twelve of these divisors, which add up to 336. The harmonic mean of these divisors is 5, which is an integer, thus 140 is a harmonic divisor number (A001599). - Alonso del Arte, May 28 2017
MATHEMATICA
Divisors[140] (* Vladimir Joseph Stephan Orlovsky, Feb 18 2012 *)
PROG
(PARI) divisors(140) \\ Charles R Greathouse IV, Jun 22 2017
CROSSREFS
Sequence in context: A035547 A018598 A018756 * A351390 A218074 A241735
KEYWORD
nonn,fini,full,easy
AUTHOR
STATUS
approved