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A018301
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Divisors of 140.
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0
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1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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COMMENTS
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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
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LINKS
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,fini,full,easy
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AUTHOR
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STATUS
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approved
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