LCM of 861, 749, 390, 621, 909
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 861, 749, 390, 621, 909 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 861, 749, 390, 621, 909. So, keep reading to learn more.
Given numbers are 861,749,390,621,909
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 861,749,390,621,909 is 250392894570.
Find LCM of 861,749,390,621,909 with Prime Factorization
| 3 | 861, 749, 390, 621, 909 |
| 3 | 287, 749, 130, 207, 303 |
| 7 | 287, 749, 130, 69, 101 |
| 41, 107, 130, 69, 101 |
Multiply the prime numbers at the bottom and the left side.
3 x 3 x 7 x 41 x 107 x 130 x 69 x 101 = 250392894570
Therefore, the lowest common multiple of 861,749,390,621,909 is 250392894570.
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.
861 x 749 x 390 x 621 x 909 = 141972771221190
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.
861 : 1, 3, 7, 21, 41, 123, 287, 861
749 : 1, 7, 107, 749
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
621 : 1, 3, 9, 23, 27, 69, 207, 621
909 : 1, 3, 9, 101, 303, 909
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 861,749,390,621,909, is 1.
Now, the common factors can be found like this.
861:3x 7x 41
749:7x 107
390:2x 3x 5x 13
621:3x 3x 3x 23
909:3x 3x 101
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 3x 3x 7 = 567
Therefore, the value for common factors is 567.
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 = 141972771221190/(1x567)
LCM = 141972771221190/567
LCM = 250392894570
Thus, we can understand that the LCM of 861,749,390,621,909 is 250392894570.
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FAQs on LCM of 861, 749, 390, 621, 909
1. What is the LCM of 861, 749, 390, 621, 909?
Answer: LCM of 861, 749, 390, 621, 909 is 250392894570.
2. How to calculate the LCM of 861, 749, 390, 621, 909?
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 861, 749, 390, 621, 909.
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}.