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 3, 18 i.e. 3 largest integer by which both the numbers can be divided.
Greatest common factor (GCF) of 3 and 18 is 3.
GCF(3,18) = 3
Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;
Prime Factorization of 3
3 | 3 |
1 |
Prime factors of 3 are 3. Prime factorization of 3 in exponential form is:
3 = 31
Prime Factorization of 18
2 | 18 |
3 | 9 |
3 | 3 |
1 |
Prime factors of 18 are 2.Prime factorization of 18 in exponential form is:
18 = 21×32
∴ So by taking common prime factors GCF of 3 and 18 is 3
Factors of 3
List of positive integer factors of 3 that divides 3 without a remainder.
1,3
Factors of 18
List of positive integer factors of 18 that divides 18 without a remainder.
1,2,3,6,9,18
Greatest Common Factor
We found the factors and prime factorization of 3 and 18. The biggest common factor number is the GCF number.
So the greatest common factor 3 and 18 is 3.
Also check out the Least Common Multiple of 3 and 18
(i) The GCF of 3 and 18 is associative
GCF of 3 and 18 = GCF of 18 and 3
1. What is the GCF of 3 and 18?
Answer: GCF of 3 and 18 is 3.
2. What are the Factors of 3?
Answer: Factors of 3 are 1, 3. There are 2 integers that are factors of 3. The greatest factor of 3 is 3.
3. What are the Factors of 18?
Answer: Factors of 18 are 1, 2, 3, 6, 9, 18. There are 6 integers that are factors of 18. The greatest factor of 18 is 18.
4. How to Find the GCF of 3 and 18?
Answer:
Greatest Common Factor of 3 and 18 = 3
Step 1: Find the prime factorization of 3
3 = 3
Step 2: Find the prime factorization of 18
18 = 2 x 3 x 3
Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:
GCF = 3
Step 4: Therefore, the greatest common factor of 3 and 18 is 3