Both values are prime, thus we conclude that the GCF (and the only common factor) is 1.
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There is NO common factor between '13' & '19' , as both these numbers are prime numbers.
However, they do have a common MULTIPLE which is 13 X 19 = 247.
13 and 19 are both prime numbers. Their only common factor is ' 1 '.
The greatest common factor of 19 and 38 is 19.
The greatest common factor of 76 and 95 is 19.The factors of 76 are 1, 2, 4, 19, 38 and 76.The factors of 95 are 1, 5, 19 & 95.Therefore the greatest common factor is 19.
A factor is a number that divides into another number. Factors of 19 are 1 and 19. Factors of 49 are 1, 7, and 49. Therefore, 1 is the greatest common factor.
19 = 7*13