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Solution:
Prime factorization means expressing a composite number as the product of its prime factors.
The prime factorization of 40 is the representation of 40 as a product of prime numbers and can be done in the following way:
40 = 2 × 2 × 2 × 5 = 23 × 5
Thus, we have seen the prime factorization of 40 as 2 × 2 × 2 × 5.
Summary:
The prime factorization of 40 = 2 × 2 × 2 × 5 = 23 × 5