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 1533, 1540 i.e. 7 largest integer by which both the numbers can be divided.
Greatest common factor (GCF) of 1533 and 1540 is 7.
GCF(1533,1540) = 7
Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;
Prime Factorization of 1533
3 | 1533 |
7 | 511 |
73 | 73 |
1 |
Prime factors of 1533 are 3,7,73. Prime factorization of 1533 in exponential form is:
1533 = 31×71×731
Prime Factorization of 1540
2 | 1540 |
2 | 770 |
5 | 385 |
7 | 77 |
11 | 11 |
1 |
Prime factors of 1540 are 2,5,7,11. Prime factorization of 1540 in exponential form is:
1540 = 22×51×71×111
∴ So by taking common prime factors GCF of 1533 and 1540 is 7
Factors of 1533
List of positive integer factors of 1533 that divides 1533 without a remainder.
1,3,7,21,73,219,511,1533
Factors of 1540
List of positive integer factors of 1540 that divides 1540 without a remainder.
1,2,4,5,7,10,11,14,20,22,28,35,44,55,70,77,110,140,154,220,308,385,770,1540
Greatest Common Factor
We found the factors and prime factorization of 1533 and 1540. The biggest common factor number is the GCF number.
So the greatest common factor 1533 and 1540 is 7.
Also check out the Least Common Multiple of 1533 and 1540
(i) The GCF of 1533 and 1540 is associative
GCF of 1533 and 1540 = GCF of 1540 and 1533
1. What is the GCF of 1533 and 1540?
Answer: GCF of 1533 and 1540 is 7.
2. What are the Factors of 1533?
Answer: Factors of 1533 are 1, 3, 7, 21, 73, 219, 511, 1533. There are 8 integers that are factors of 1533. The greatest factor of 1533 is 1533.
3. What are the Factors of 1540?
Answer: Factors of 1540 are 1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540. There are 24 integers that are factors of 1540. The greatest factor of 1540 is 1540.
4. How to Find the GCF of 1533 and 1540?
Answer:
Greatest Common Factor of 1533 and 1540 = 7
Step 1: Find the prime factorization of 1533
1533 = 3 x 7 x 73
Step 2: Find the prime factorization of 1540
1540 = 2 x 2 x 5 x 7 x 11
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 1533 and 1540 is 7