420 = 22 x 3 x 5 x 7
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To find the greatest common factor (GCF) of 180, 450, and 420, we first need to find the prime factorization of each number. The prime factorization of 180 is 2^2 x 3^2 x 5, the prime factorization of 450 is 2 x 3^2 x 5^2, and the prime factorization of 420 is 2^2 x 3 x 5 x 7. The GCF is the product of the common prime factors raised to the lowest power, which in this case is 2^2 x 3 = 12. Therefore, the greatest common factor of 180, 450, and 420 is 12.
Greatest common factor of 420 and 504 is 84.
35 can be a factor, but it is not prime.
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The prime factorization of 420 is: 2 × 2 × 3 × 5 × 7