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LCM by pairs (Posted on 2013-10-14) Difficulty: 2 of 5
Determine the total number of pairs (x, y) of positive integers such that the least common multiple (LCM) of x and y is 23*57*1113.

No Solution Yet Submitted by K Sengupta    
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Solution answer - spoiler | Comment 1 of 4
The number of un-ordered pairs is  .5*(3+1)*(7+1)*(13+1)=224
The number of ordered pairs is  (3+1)*(7+1)*(13+1)=448

  Posted by Ady TZIDON on 2013-10-14 10:27:53
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