What is the Greatest Common Factor of 800 and 820?
Greatest common factor (GCF) of 800 and 820 is 20.
GCF(800,820) = 20
We will now calculate the prime factors of 800 and 820, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 800 and 820.
How to find the GCF of 800 and 820?
We will first find the prime factorization of 800 and 820. After we will calculate the factors of 800 and 820 and find the biggest common factor number .
Step-1: Prime Factorization of 800
Prime factors of 800 are 2, 5. Prime factorization of 800 in exponential form is:
800 = 25 × 52
Step-2: Prime Factorization of 820
Prime factors of 820 are 2, 5, 41. Prime factorization of 820 in exponential form is:
820 = 22 × 51 × 411
Step-3: Factors of 800
List of positive integer factors of 800 that divides 800 without a remainder.
1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400
Step-4: Factors of 820
List of positive integer factors of 820 that divides 800 without a remainder.
1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410
Final Step: Biggest Common Factor Number
We found the factors and prime factorization of 800 and 820. The biggest common factor number is the GCF number.
So the greatest common factor 800 and 820 is 20.
Also check out the Least Common Multiple of 800 and 820
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