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LCM 540 (Posted on 2014-12-22) Difficulty: 3 of 5
How many pairs of positive integers, without regard to order, have a least common multiple of 540?

See The Solution Submitted by Charlie    
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re: No Subject | Comment 3 of 6 |
(In reply to No Subject by Dej Mar)

On your list, (12, 270), to take one example, is missing.


There's an analytic method that will arrive at the answer without enumerating the pairs; in fact I only now wrote a program to enumerate the pairs so I could find an example of a missing pair.

  Posted by Charlie on 2014-12-22 12:31:37
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