What is the Greatest Common Factor of 855 and 874?
Greatest common factor (GCF) of 855 and 874 is 19.
GCF(855,874) = 19
We will now calculate the prime factors of 855 and 874, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 855 and 874.
How to find the GCF of 855 and 874?
We will first find the prime factorization of 855 and 874. After we will calculate the factors of 855 and 874 and find the biggest common factor number .
Step-1: Prime Factorization of 855
Prime factors of 855 are 3, 5, 19. Prime factorization of 855 in exponential form is:
855 = 32 × 51 × 191
Step-2: Prime Factorization of 874
Prime factors of 874 are 2, 19, 23. Prime factorization of 874 in exponential form is:
874 = 21 × 191 × 231
Step-3: Factors of 855
List of positive integer factors of 855 that divides 855 without a remainder.
1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285
Step-4: Factors of 874
List of positive integer factors of 874 that divides 855 without a remainder.
1, 2, 19, 23, 38, 46, 437
Final Step: Biggest Common Factor Number
We found the factors and prime factorization of 855 and 874. The biggest common factor number is the GCF number.
So the greatest common factor 855 and 874 is 19.
Also check out the Least Common Multiple of 855 and 874
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