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 420, 426 i.e. 6 largest integer by which both the numbers can be divided.
Greatest common factor (GCF) of 420 and 426 is 6.
GCF(420,426) = 6
Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;
Prime Factorization of 420
2 | 420 |
2 | 210 |
3 | 105 |
5 | 35 |
7 | 7 |
1 |
Prime factors of 420 are 2,3,5,7. Prime factorization of 420 in exponential form is:
420 = 22×31×51×71
Prime Factorization of 426
2 | 426 |
3 | 213 |
71 | 71 |
1 |
Prime factors of 426 are 2,3,71. Prime factorization of 426 in exponential form is:
426 = 21×31×711
∴ So by taking common prime factors GCF of 420 and 426 is 6
Factors of 420
List of positive integer factors of 420 that divides 420 without a remainder.
1,2,3,4,5,6,7,10,12,14,15,20,21,28,30,35,42,60,70,84,105,140,210,420
Factors of 426
List of positive integer factors of 426 that divides 426 without a remainder.
1,2,3,6,71,142,213,426
Greatest Common Factor
We found the factors and prime factorization of 420 and 426. The biggest common factor number is the GCF number.
So the greatest common factor 420 and 426 is 6.
Also check out the Least Common Multiple of 420 and 426
(i) The GCF of 420 and 426 is associative
GCF of 420 and 426 = GCF of 426 and 420
1. What is the GCF of 420 and 426?
Answer: GCF of 420 and 426 is 6.
2. What are the Factors of 420?
Answer: Factors of 420 are 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420. There are 24 integers that are factors of 420. The greatest factor of 420 is 420.
3. What are the Factors of 426?
Answer: Factors of 426 are 1, 2, 3, 6, 71, 142, 213, 426. There are 8 integers that are factors of 426. The greatest factor of 426 is 426.
4. How to Find the GCF of 420 and 426?
Answer:
Greatest Common Factor of 420 and 426 = 6
Step 1: Find the prime factorization of 420
420 = 2 x 2 x 3 x 5 x 7
Step 2: Find the prime factorization of 426
426 = 2 x 3 x 71
Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:
GCF = 2 x 3 = 6
Step 4: Therefore, the greatest common factor of 420 and 426 is 6