smallest number that has 2,5,7 as its prime number .
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First 5 prime numbers = 2, 3, 5,
Therefore, smallest no. have different 3 prime factors = L.C.M of 2, 3, 5,
As prime nos. are only divisible by 1 and themselves, we have to multiple all of them with each other.
i.e. 2×3×5=【30】
Therefore, 30 is the no. which have 3 different prime factors.
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