Greatest Common Factor of 642 and 649

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 642, 649 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 642 and 649 is 1.

GCF(642,649) = 1

GCF of 642 and 649

Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;

GCF of:
and

Greatest Common Factor of 642 and 649

GCF of 642 and 649 is 1

Prime Factorization of 642


2 642
3 321
107 107
1

Prime factors of 642 are 2,3,107. Prime factorization of 642 in exponential form is:

642 = 21×31×1071

Prime Factorization of 649


11 649
59 59
1

Prime factors of 649 are 11,59. Prime factorization of 649 in exponential form is:

649 = 111×591

∴ So by taking common prime factors GCF of 642 and 649 is 1

Greatest Common Factor of 642 and 649 by matching factors method

Factors of 642

List of positive integer factors of 642 that divides 642 without a remainder.

1,2,3,6,107,214,321,642

Factors of 649

List of positive integer factors of 649 that divides 649 without a remainder.

1,11,59,649

Greatest Common Factor

We found the factors and prime factorization of 642 and 649. The biggest common factor number is the GCF number.
So the greatest common factor 642 and 649 is 1.

Also check out the Least Common Multiple of 642 and 649

Properties of GCF 642 and 649

(i) The GCF of 642 and 649 is associative

GCF of 642 and 649 = GCF of 649 and 642

Related Greatest Common Factor of 642

Related Greatest Common Factor of 649

Frequently Asked Questions on GCF of 642 and 649

1. What is the GCF of 642 and 649?

Answer: GCF of 642 and 649 is 1.

2. What are the Factors of 642?

Answer: Factors of 642 are 1, 2, 3, 6, 107, 214, 321, 642. There are 8 integers that are factors of 642. The greatest factor of 642 is 642.

3. What are the Factors of 649?

Answer: Factors of 649 are 1, 11, 59, 649. There are 4 integers that are factors of 649. The greatest factor of 649 is 649.

4. How to Find the GCF of 642 and 649?

Answer:

Greatest Common Factor of 642 and 649 = 1

Step 1: Find the prime factorization of 642

642 = 2 x 3 x 107

Step 2: Find the prime factorization of 649

649 = 11 x 59

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = = 1

Step 4: Therefore, the greatest common factor of 642 and 649 is 1