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 30, 38 i.e. 2 largest integer by which both the numbers can be divided.
Greatest common factor (GCF) of 30 and 38 is 2.
GCF(30,38) = 2
Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;
Prime Factorization of 30
2 | 30 |
3 | 15 |
5 | 5 |
1 |
Prime factors of 30 are 2,3,5. Prime factorization of 30 in exponential form is:
30 = 21×31×51
Prime Factorization of 38
2 | 38 |
19 | 19 |
1 |
Prime factors of 38 are 2,19. Prime factorization of 38 in exponential form is:
38 = 21×191
∴ So by taking common prime factors GCF of 30 and 38 is 2
Factors of 30
List of positive integer factors of 30 that divides 30 without a remainder.
1,2,3,5,6,10,15,30
Factors of 38
List of positive integer factors of 38 that divides 38 without a remainder.
1,2,19,38
Greatest Common Factor
We found the factors and prime factorization of 30 and 38. The biggest common factor number is the GCF number.
So the greatest common factor 30 and 38 is 2.
Also check out the Least Common Multiple of 30 and 38
(i) The GCF of 30 and 38 is associative
GCF of 30 and 38 = GCF of 38 and 30
1. What is the GCF of 30 and 38?
Answer: GCF of 30 and 38 is 2.
2. What are the Factors of 30?
Answer: Factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30. There are 8 integers that are factors of 30. The greatest factor of 30 is 30.
3. What are the Factors of 38?
Answer: Factors of 38 are 1, 2, 19, 38. There are 4 integers that are factors of 38. The greatest factor of 38 is 38.
4. How to Find the GCF of 30 and 38?
Answer:
Greatest Common Factor of 30 and 38 = 2
Step 1: Find the prime factorization of 30
30 = 2 x 3 x 5
Step 2: Find the prime factorization of 38
38 = 2 x 19
Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:
GCF = 2
Step 4: Therefore, the greatest common factor of 30 and 38 is 2