LCM of 432, 780, 309, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 432, 780, 309, 721 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 432, 780, 309, 721. So, keep reading to learn more.
Given numbers are 432,780,309,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 432,780,309,721 is 20245680.
Find LCM of 432,780,309,721 with Prime Factorization
| 2 | 432, 780, 309, 721 |
| 2 | 216, 390, 309, 721 |
| 3 | 108, 195, 309, 721 |
| 103 | 36, 65, 103, 721 |
| 36, 65, 1, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 103 x 36 x 65 x 1 x 7 = 20245680
Therefore, the lowest common multiple of 432,780,309,721 is 20245680.
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.
432 x 780 x 309 x 721 = 75070981440
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.
432 : 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 108, 144, 216, 432
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
309 : 1, 3, 103, 309
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 432,780,309,721, is 1.
Now, the common factors can be found like this.
432:2x 2x 2x 2x 3x 3x 3
780:2x 2x 3x 5x 13
309:3x 103
721:7x 103
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 3x 3x 103 = 3708
Therefore, the value for common factors is 3708.
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 = 75070981440/(1x3708)
LCM = 75070981440/3708
LCM = 20245680
Thus, we can understand that the LCM of 432,780,309,721 is 20245680.
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FAQs on LCM of 432, 780, 309, 721
1. What is the LCM of 432, 780, 309, 721?
Answer: LCM of 432, 780, 309, 721 is 20245680.
2. How to calculate the LCM of 432, 780, 309, 721?
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 432, 780, 309, 721.
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}.