The prime factors of 91 are: 7, 13
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The prime factors of 91 are 7 and 13. 13 is a prime number so only has 1 and itself as factors. Therefore the only common factors for 13 and 91 are 1 and 13.
As a product of its prime factors: 7*13 = 91
91 is neither a prime nor a squared number. It is a composite having the prime factors 7 x 13.
91 is a composite number. The factors of 91 are 7 and 13.139 is a prime number13 is a prime number29 is a prime number.
As a product of its prime factors: 7*13 = 91