Let m and n be positive integers such that m has exactly 5 positive divisors, n has exactly 6 positive divisors, and mn has exactly 14 positive divisors.
How many distinct prime factors does mn have?
https://web2.0calc.com/questions/a-let-m-be-a-positive-integer-such-that-m-has-exactly-5-positive-divisors-how-many-distinct-prime-factors-does-m-have
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+368 
