LCM of 420, 686, 871, 930
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 420, 686, 871, 930 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 420, 686, 871, 930. So, keep reading to learn more.
Given numbers are 420,686,871,930
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 420,686,871,930 is 555680580.
Find LCM of 420,686,871,930 with Prime Factorization
| 2 | 420, 686, 871, 930 |
| 3 | 210, 343, 871, 465 |
| 5 | 70, 343, 871, 155 |
| 7 | 14, 343, 871, 31 |
| 2, 49, 871, 31 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 7 x 2 x 49 x 871 x 31 = 555680580
Therefore, the lowest common multiple of 420,686,871,930 is 555680580.
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.
420 x 686 x 871 x 930 = 233385843600
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.
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
686 : 1, 2, 7, 14, 49, 98, 343, 686
871 : 1, 13, 67, 871
930 : 1, 2, 3, 5, 6, 10, 15, 30, 31, 62, 93, 155, 186, 310, 465, 930
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 420,686,871,930, is 1.
Now, the common factors can be found like this.
420:2x 2x 3x 5x 7
686:2x 7x 7x 7
871:13x 67
930:2x 3x 5x 31
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 5x 7 = 420
Therefore, the value for common factors is 420.
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 = 233385843600/(1x420)
LCM = 233385843600/420
LCM = 555680580
Thus, we can understand that the LCM of 420,686,871,930 is 555680580.
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FAQs on LCM of 420, 686, 871, 930
1. What is the LCM of 420, 686, 871, 930?
Answer: LCM of 420, 686, 871, 930 is 555680580.
2. How to calculate the LCM of 420, 686, 871, 930?
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 420, 686, 871, 930.
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}.