What is the Greatest Common Factor of 81940 and 81956?

Greatest common factor (GCF) of 81940 and 81956 is 4.

GCF(81940,81956) = 4

We will now calculate the prime factors of 81940 and 81956, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81940 and 81956.

How to find the GCF of 81940 and 81956?

We will first find the prime factorization of 81940 and 81956. After we will calculate the factors of 81940 and 81956 and find the biggest common factor number .

Step-1: Prime Factorization of 81940

Prime factors of 81940 are 2, 5, 17, 241. Prime factorization of 81940 in exponential form is:

81940 = 2² × 5¹ × 17¹ × 241¹

Step-2: Prime Factorization of 81956

Prime factors of 81956 are 2, 7, 2927. Prime factorization of 81956 in exponential form is:

81956 = 2² × 7¹ × 2927¹

Step-3: Factors of 81940

List of positive integer factors of 81940 that divides 81940 without a remainder.

1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 241, 340, 482, 964, 1205, 2410, 4097, 4820, 8194, 16388, 20485, 40970

Step-4: Factors of 81956

List of positive integer factors of 81956 that divides 81940 without a remainder.

1, 2, 4, 7, 14, 28, 2927, 5854, 11708, 20489, 40978

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81940 and 81956. The biggest common factor number is the GCF number.
So the greatest common factor 81940 and 81956 is 4.

Also check out the Least Common Multiple of 81940 and 81956