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23 = 2*2*2 . thus the number (8) has three prime factors - each of which is a 2.
8 is not prime a prime number because it has other factors aside from 1 and itself.The other factor of 8 is 2.
3 is a prime number. The other numbers are even numbers greater than 2, so they are composite numbers, not prime numbers.
Yes, they are relatively prime.
The prime numbers are 2, 3, and 7. They are the ones that have no factors other than 1 and the number itself.