Prime Factorization is finding which prime numbers multiply together to make the original number.
So if the number has a prime factor of 2 and 7 then it will be the multiple of 2×7 = 14
Given Number is between 39 and 44
So the number between 39 and 44 is must be a multiple of 14.
Multiple of 14 between 39 and 44 =
14×3 = 42