The factors of 57 are: 1, 3, 19, 57
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The greatest common factor of the numbers 57 and 93 is 3.
To find out the GCF of two numbers, you first split them into their prime factors: 57 = 3x19 27 = 3x3x3 The next step is to identify any common factors. In this case, both numbers have a single 3 as a prime factor. Thus, the greatest common factor of 57 and 27 is 3.
5 is not a factor of 57.
No, 19 is a factor of 57.
The greatest, and only, common factor of 57 (=3x19) and 28 (=22x7) is 1.