view question and its corresponding solution related to this thread.
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as per the question,its clear that he will be able to find the two numbers which on production foms a given natural number only if those two numbes are prime,

 as for examle,

 option 1: 48 could be made uo of: 6*8,3*16,4*12 etc

 option 3 : for 60: 10*6,2*30,15*4 etc

  in the same way we cannot find the unique pair of numbers but if both of them are prime as in 55(option 2),only one pair is possible (11,5)