What is the Greatest Common Factor of 2620 and 2640?

Greatest common factor (GCF) of 2620 and 2640 is 20.

GCF(2620,2640) = 20

We will now calculate the prime factors of 2620 and 2640, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2620 and 2640.

How to find the GCF of 2620 and 2640?

We will first find the prime factorization of 2620 and 2640. After we will calculate the factors of 2620 and 2640 and find the biggest common factor number .

Step-1: Prime Factorization of 2620

Prime factors of 2620 are 2, 5, 131. Prime factorization of 2620 in exponential form is:

2620 = 2² × 5¹ × 131¹

Step-2: Prime Factorization of 2640

Prime factors of 2640 are 2, 3, 5, 11. Prime factorization of 2640 in exponential form is:

2640 = 2⁴ × 3¹ × 5¹ × 11¹

Step-3: Factors of 2620

List of positive integer factors of 2620 that divides 2620 without a remainder.

1, 2, 4, 5, 10, 20, 131, 262, 524, 655, 1310

Step-4: Factors of 2640

List of positive integer factors of 2640 that divides 2620 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 80, 88, 110, 120, 132, 165, 176, 220, 240, 264, 330, 440, 528, 660, 880, 1320

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2620 and 2640. The biggest common factor number is the GCF number.
So the greatest common factor 2620 and 2640 is 20.

Also check out the Least Common Multiple of 2620 and 2640