It is not possible to give a sensible answer to this question. The highest common factor (HCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
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You don't. You need at least two numbers to find a GCF. If that's 14 and 7, the GCF is 7.
147
LCM = Product/HCF = 384
You can not find the least common multiple of just one number. You can find the multiples of 147 but have nothing to compare it to to find the "least" first 6 multiples of 147 - 147, 294, 441, 588, 735, 882
To find the number, you can divide 147 by 2.1, which equals approximately 70.
Yes: product of a & b = LCM x HCF so b = (LCM x HCF)/a