What is the Greatest Common Factor of 42775 and 42780?

Greatest common factor (GCF) of 42775 and 42780 is 5.

GCF(42775,42780) = 5

We will now calculate the prime factors of 42775 and 42780, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 42775 and 42780.

How to find the GCF of 42775 and 42780?

We will first find the prime factorization of 42775 and 42780. After we will calculate the factors of 42775 and 42780 and find the biggest common factor number .

Step-1: Prime Factorization of 42775

Prime factors of 42775 are 5, 29, 59. Prime factorization of 42775 in exponential form is:

42775 = 5² × 29¹ × 59¹

Step-2: Prime Factorization of 42780

Prime factors of 42780 are 2, 3, 5, 23, 31. Prime factorization of 42780 in exponential form is:

42780 = 2² × 3¹ × 5¹ × 23¹ × 31¹

Step-3: Factors of 42775

List of positive integer factors of 42775 that divides 42775 without a remainder.

1, 5, 25, 29, 59, 145, 295, 725, 1475, 1711, 8555

Step-4: Factors of 42780

List of positive integer factors of 42780 that divides 42775 without a remainder.

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 23, 30, 31, 46, 60, 62, 69, 92, 93, 115, 124, 138, 155, 186, 230, 276, 310, 345, 372, 460, 465, 620, 690, 713, 930, 1380, 1426, 1860, 2139, 2852, 3565, 4278, 7130, 8556, 10695, 14260, 21390

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 42775 and 42780. The biggest common factor number is the GCF number.
So the greatest common factor 42775 and 42780 is 5.

Also check out the Least Common Multiple of 42775 and 42780