Any multiple of 19 has 19 as a factor.
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The greatest common factor (GCF) of two numbers is the largest number that divides both numbers without leaving a remainder. In this case, the numbers 19 and 38 have a GCF of 19. This is because 19 is a prime number and the only common factor of 19 and 38. Therefore, the GCF of 19 and 38 is 19.
The GCF of 3 and 19 is 1. Because 3 and 19 are both prime numbers, they have no other common factor.
It is 1 because 7 and 19 are prime numbers
19 is the greatest common factor. 19/19=1, 76/19=4.
The only common factor of the given numbers is 1 because 19 is a prime number