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Prime factorization of 28 is 22x7 So the prime factors are 2 and 7
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To find the prime factors of a number, it is best to divide them by their obvious divisors. In this case, 28 is prime so can divide by 2. This gives us 14. This is known to be 7x2 from times tables, and so we have finished factorizing 28. The prime factors are 2, 2 and 7. This can be expressed in powers as 7x22.
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