61 and 2
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The prime factors of 63 are: 3,7.3 x 3 x 7The prime numbers (factors) of 63 are: 3 and 73 and 73*3*7
67 is prime.
63 has the factors 1, 3, 7, 9, 21, 63 43 is a prime number because there are no numbers that can divide into one and itself.
31 and 47 are prime.
7*3*3