What is the Greatest Common Factor of 7120 and 7140?

Greatest common factor (GCF) of 7120 and 7140 is 20.

GCF(7120,7140) = 20

We will now calculate the prime factors of 7120 and 7140, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 7120 and 7140.

How to find the GCF of 7120 and 7140?

We will first find the prime factorization of 7120 and 7140. After we will calculate the factors of 7120 and 7140 and find the biggest common factor number .

Step-1: Prime Factorization of 7120

Prime factors of 7120 are 2, 5, 89. Prime factorization of 7120 in exponential form is:

7120 = 2⁴ × 5¹ × 89¹

Step-2: Prime Factorization of 7140

Prime factors of 7140 are 2, 3, 5, 7, 17. Prime factorization of 7140 in exponential form is:

7140 = 2² × 3¹ × 5¹ × 7¹ × 17¹

Step-3: Factors of 7120

List of positive integer factors of 7120 that divides 7120 without a remainder.

1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 3560

Step-4: Factors of 7140

List of positive integer factors of 7140 that divides 7120 without a remainder.

1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 51, 60, 68, 70, 84, 85, 102, 105, 119, 140, 170, 204, 210, 238, 255, 340, 357, 420, 476, 510, 595, 714, 1020, 1190, 1428, 1785, 2380, 3570

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 7120 and 7140. The biggest common factor number is the GCF number.
So the greatest common factor 7120 and 7140 is 20.

Also check out the Least Common Multiple of 7120 and 7140