9 and 13
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Factors of 91: 1, 7, 13, 91Factors of 117: 1, 3, 9, 13, 39, 117GCF (91, 117) = 13
The common prime factors of 27 and 117 are the prime numbers that can divide both 27 and 117 without leaving a remainder. The prime factorization of 27 is 3 x 3 x 3, and the prime factorization of 117 is 3 x 3 x 13. The only common prime factor between 27 and 117 is 3, as it is the only prime number that appears in the factorization of both numbers.
Divide both parts by 9, as they are common factors. That gives you 8 and 13.
the common factor of 16 and 117 is : 1
The Greatest Common Divisor of 54, 117 is 9.