no
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Logically, the smallest number with 4 different prime factors would have to be the product of the smallest four prime numbers. So the smallest natural number with four different prime factors is 210 (2*3*5*7).
8192 has 13 prime factors
Any prime number.
293 is a prime number.
If I'm reading the question correctly, X = 6 (not a prime number). 3X = 18, and its four factors are 1, 2, 3 and 9