**Important Concepts and Formulas**

1. The process of writing a composite
number as a product of prime factors is called the prime factorization of the
given number.

2. The prime factorization of every
composite number is unique.

5. The HCF of two co-prime numbers is 1.

6. The LCM of two co-prime numbers is
their product.

7. The product of two numbers is equal
to the product of their HCF and LCM.

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