In finding the LCM or HCF of two or more numbers
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The prime factorization of 560 is: 2, 5, and 7
If your numbers have no prime factors in common, they are relatively prime.
Use the disibility rules
To answer GCF and LCM questions.
Once your prime factorization is complete and you discover that there are no numbers in common, the GCF is one and the numbers are declared to be relatively prime.