What is the Greatest Common Factor of 395 and 402?

Greatest common factor (GCF) of 395 and 402 is 1.

GCF(395,402) = 1

We will now calculate the prime factors of 395 and 402, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 395 and 402.

How to find the GCF of 395 and 402?

We will first find the prime factorization of 395 and 402. After we will calculate the factors of 395 and 402 and find the biggest common factor number .

Step-1: Prime Factorization of 395

Prime factors of 395 are 5, 79. Prime factorization of 395 in exponential form is:

395 = 5¹ × 79¹

Step-2: Prime Factorization of 402

Prime factors of 402 are 2, 3, 67. Prime factorization of 402 in exponential form is:

402 = 2¹ × 3¹ × 67¹

Step-3: Factors of 395

List of positive integer factors of 395 that divides 395 without a remainder.

1, 5, 79

Step-4: Factors of 402

List of positive integer factors of 402 that divides 395 without a remainder.

1, 2, 3, 6, 67, 134, 201

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 395 and 402. The biggest common factor number is the GCF number.
So the greatest common factor 395 and 402 is 1.

Also check out the Least Common Multiple of 395 and 402