What is the Greatest Common Factor of 42978 and 42985?

Greatest common factor (GCF) of 42978 and 42985 is 1.

GCF(42978,42985) = 1

We will now calculate the prime factors of 42978 and 42985, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42978 and 42985.

How to find the GCF of 42978 and 42985?

We will first find the prime factorization of 42978 and 42985. After we will calculate the factors of 42978 and 42985 and find the biggest common factor number .

Step-1: Prime Factorization of 42978

Prime factors of 42978 are 2, 3, 13, 19, 29. Prime factorization of 42978 in exponential form is:

42978 = 2¹ × 3¹ × 13¹ × 19¹ × 29¹

Step-2: Prime Factorization of 42985

Prime factors of 42985 are 5, 8597. Prime factorization of 42985 in exponential form is:

42985 = 5¹ × 8597¹

Step-3: Factors of 42978

List of positive integer factors of 42978 that divides 42978 without a remainder.

1, 2, 3, 6, 13, 19, 26, 29, 38, 39, 57, 58, 78, 87, 114, 174, 247, 377, 494, 551, 741, 754, 1102, 1131, 1482, 1653, 2262, 3306, 7163, 14326, 21489

Step-4: Factors of 42985

List of positive integer factors of 42985 that divides 42978 without a remainder.

1, 5, 8597

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42978 and 42985. The biggest common factor number is the GCF number.
So the greatest common factor 42978 and 42985 is 1.

Also check out the Least Common Multiple of 42978 and 42985