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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.
You need at least two numbers to find something in common, but I'll save you the trouble. The least common factor of any set of positive integers is 1.
because 70 is an even number, and every even number has 2 as a factor.
Itself and one
2 and 7 are prime numbers less than 10 that are factors of 42 and 70.