Remember, factors are the numbers that can be divided completely by the given number.(that means no remainder).If the question ask for prime factors,just pick the prime numbers from the factors.When you factorize numbers, only use prime numbers and start from the lowest possible prime number. HCF means factorizing the number as far as it can. LCM means factorizing the numbers until you get only the number 1 at the bottom. Good luck.

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