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 385, 392 i.e. 7 largest integer by which both the numbers can be divided.
Greatest common factor (GCF) of 385 and 392 is 7.
GCF(385,392) = 7
Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;
Prime Factorization of 385
5 | 385 |
7 | 77 |
11 | 11 |
1 |
Prime factors of 385 are 5,7,11. Prime factorization of 385 in exponential form is:
385 = 51×71×111
Prime Factorization of 392
2 | 392 |
2 | 196 |
2 | 98 |
7 | 49 |
7 | 7 |
1 |
Prime factors of 392 are 2,7. Prime factorization of 392 in exponential form is:
392 = 23×72
∴ So by taking common prime factors GCF of 385 and 392 is 7
Factors of 385
List of positive integer factors of 385 that divides 385 without a remainder.
1,5,7,11,35,55,77,385
Factors of 392
List of positive integer factors of 392 that divides 392 without a remainder.
1,2,4,7,8,14,28,49,56,98,196,392
Greatest Common Factor
We found the factors and prime factorization of 385 and 392. The biggest common factor number is the GCF number.
So the greatest common factor 385 and 392 is 7.
Also check out the Least Common Multiple of 385 and 392
(i) The GCF of 385 and 392 is associative
GCF of 385 and 392 = GCF of 392 and 385
1. What is the GCF of 385 and 392?
Answer: GCF of 385 and 392 is 7.
2. What are the Factors of 385?
Answer: Factors of 385 are 1, 5, 7, 11, 35, 55, 77, 385. There are 8 integers that are factors of 385. The greatest factor of 385 is 385.
3. What are the Factors of 392?
Answer: Factors of 392 are 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392. There are 12 integers that are factors of 392. The greatest factor of 392 is 392.
4. How to Find the GCF of 385 and 392?
Answer:
Greatest Common Factor of 385 and 392 = 7
Step 1: Find the prime factorization of 385
385 = 5 x 7 x 11
Step 2: Find the prime factorization of 392
392 = 2 x 2 x 2 x 7 x 7
Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:
GCF = 7
Step 4: Therefore, the greatest common factor of 385 and 392 is 7