A018301 Divisors of 140.

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

Links

Table of n, a(n) for n=1..12.

Index entries for sequences related to divisors of numbers

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

Adjacent sequences: A018298 A018299 A018300 * A018302 A018303 A018304

Keyword

nonn,fini,full,easy

Author

N. J. A. Sloane.

Status

approved