20 = 2*2*5
70 = 2*5*7
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Greatest Prime Factor of 70The prime factorization of 70 is 2 X 5 X 7, so the greatest prime factor in the prime factorization of 70 is 7.
The prime factorization of 20 is: 2 × 2 × 5
Prime Factorization:20 = 2 * 2 * 530 = 2 * 3 * 5
2*2*5 = 20
70 = 2 * 5 * 7