57 can be divided by: 1, 3, 19, 57.
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Any of its factors which are: 1, 3, 19 and 57
57/3 = 19
It is 19/15.
The number 171 is composite because it can divide not just by 1 and 171 but 3, 9, 19 and 57.
The GCF of 19 and 57 is 19Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.Method:One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.The factors of 19 are 1 and 19.The factors of 57 are 1, 3, 19, and 57.The common factors are 1 and 19. Therefore, the greatest common factor is 19.