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 1997, 1998 i.e. 1 largest integer by which both the numbers can be divided.
Greatest common factor (GCF) of 1997 and 1998 is 1.
GCF(1997,1998) = 1
Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;
Prime Factorization of 1997
1997 | 1997 |
1 |
Prime factors of 1997 are 1997. Prime factorization of 1997 in exponential form is:
1997 = 19971
Prime Factorization of 1998
2 | 1998 |
3 | 999 |
3 | 333 |
3 | 111 |
37 | 37 |
1 |
Prime factors of 1998 are 2.Prime factorization of 1998 in exponential form is:
1998 = 21×33×371
∴ So by taking common prime factors GCF of 1997 and 1998 is 1
Factors of 1997
List of positive integer factors of 1997 that divides 1997 without a remainder.
1,1997
Factors of 1998
List of positive integer factors of 1998 that divides 1998 without a remainder.
1,2,3,6,9,18,27,37,54,74,111,222,333,666,999,1998
Greatest Common Factor
We found the factors and prime factorization of 1997 and 1998. The biggest common factor number is the GCF number.
So the greatest common factor 1997 and 1998 is 1.
Also check out the Least Common Multiple of 1997 and 1998
(i) The GCF of 1997 and 1998 is associative
GCF of 1997 and 1998 = GCF of 1998 and 1997
1. What is the GCF of 1997 and 1998?
Answer: GCF of 1997 and 1998 is 1.
2. What are the Factors of 1997?
Answer: Factors of 1997 are 1, 1997. There are 2 integers that are factors of 1997. The greatest factor of 1997 is 1997.
3. What are the Factors of 1998?
Answer: Factors of 1998 are 1, 2, 3, 6, 9, 18, 27, 37, 54, 74, 111, 222, 333, 666, 999, 1998. There are 16 integers that are factors of 1998. The greatest factor of 1998 is 1998.
4. How to Find the GCF of 1997 and 1998?
Answer:
Greatest Common Factor of 1997 and 1998 = 1
Step 1: Find the prime factorization of 1997
1997 = 1997
Step 2: Find the prime factorization of 1998
1998 = 2 x 3 x 3 x 3 x 37
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 1997 and 1998 is 1