What is the Greatest Common Factor of 81970 and 81981?

Greatest common factor (GCF) of 81970 and 81981 is 1.

GCF(81970,81981) = 1

We will now calculate the prime factors of 81970 and 81981, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 81970 and 81981.

How to find the GCF of 81970 and 81981?

We will first find the prime factorization of 81970 and 81981. After we will calculate the factors of 81970 and 81981 and find the biggest common factor number .

Step-1: Prime Factorization of 81970

Prime factors of 81970 are 2, 5, 7, 1171. Prime factorization of 81970 in exponential form is:

81970 = 2¹ × 5¹ × 7¹ × 1171¹

Step-2: Prime Factorization of 81981

Prime factors of 81981 are 3, 9109. Prime factorization of 81981 in exponential form is:

81981 = 3² × 9109¹

Step-3: Factors of 81970

List of positive integer factors of 81970 that divides 81970 without a remainder.

1, 2, 5, 7, 10, 14, 35, 70, 1171, 2342, 5855, 8197, 11710, 16394, 40985

Step-4: Factors of 81981

List of positive integer factors of 81981 that divides 81970 without a remainder.

1, 3, 9, 9109, 27327

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 81970 and 81981. The biggest common factor number is the GCF number.
So the greatest common factor 81970 and 81981 is 1.

Also check out the Least Common Multiple of 81970 and 81981