LCM of 457, 720, 420, 764
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 457, 720, 420, 764 with the LCM of Two or More Numbers Calculator. Here we are teaching you two different methods through which you can calculate the LCM of 457, 720, 420, 764. So, keep reading to learn more.
Given numbers are 457,720,420,764
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 457,720,420,764 is 439926480.
Find LCM of 457,720,420,764 with Prime Factorization
| 2 | 457, 720, 420, 764 |
| 2 | 457, 360, 210, 382 |
| 3 | 457, 180, 105, 191 |
| 5 | 457, 60, 35, 191 |
| 457, 12, 7, 191 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 457 x 12 x 7 x 191 = 439926480
Therefore, the lowest common multiple of 457,720,420,764 is 439926480.
LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}
Firstly, we have to find the product of all the numbers.
457 x 720 x 420 x 764 = 105582355200
Then, let us find the GCF of these five numbers. To do so, we have to list down the factors for each number and choose the highest factor that is in all of the lists.
457 : 1, 457
720 : 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
764 : 1, 2, 4, 191, 382, 764
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 457,720,420,764, is 1.
Now, the common factors can be found like this.
457:457
720:2x 2x 2x 2x 3x 3x 5
420:2x 2x 3x 5x 7
764:2x 2x 191
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 2x 2x 3x 5 = 240
Therefore, the value for common factors is 240.
Now that we have all the elements of the formula, we can plug them in to calculate the LCM.
LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}
LCM = 105582355200/(1x240)
LCM = 105582355200/240
LCM = 439926480
Thus, we can understand that the LCM of 457,720,420,764 is 439926480.
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FAQs on LCM of 457, 720, 420, 764
1. What is the LCM of 457, 720, 420, 764?
Answer: LCM of 457, 720, 420, 764 is 439926480.
2. How to calculate the LCM of 457, 720, 420, 764?
The LCM can be found using two methods. You can either use the LCM formula or the prime factorization method to calculate the LCM of 457, 720, 420, 764.
3. What is the LCM formula?
The LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}.