What is the Greatest Common Factor of 1530 and 1542?

Greatest common factor (GCF) of 1530 and 1542 is 6.

GCF(1530,1542) = 6

We will now calculate the prime factors of 1530 and 1542, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1530 and 1542.

How to find the GCF of 1530 and 1542?

We will first find the prime factorization of 1530 and 1542. After we will calculate the factors of 1530 and 1542 and find the biggest common factor number .

Step-1: Prime Factorization of 1530

Prime factors of 1530 are 2, 3, 5, 17. Prime factorization of 1530 in exponential form is:

1530 = 2¹ × 3² × 5¹ × 17¹

Step-2: Prime Factorization of 1542

Prime factors of 1542 are 2, 3, 257. Prime factorization of 1542 in exponential form is:

1542 = 2¹ × 3¹ × 257¹

Step-3: Factors of 1530

List of positive integer factors of 1530 that divides 1530 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 45, 51, 85, 90, 102, 153, 170, 255, 306, 510, 765

Step-4: Factors of 1542

List of positive integer factors of 1542 that divides 1530 without a remainder.

1, 2, 3, 6, 257, 514, 771

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1530 and 1542. The biggest common factor number is the GCF number.
So the greatest common factor 1530 and 1542 is 6.

Also check out the Least Common Multiple of 1530 and 1542