LCM of 196, 686, 639, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 196, 686, 639, 420 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 196, 686, 639, 420. So, keep reading to learn more.
Given numbers are 196,686,639,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 196,686,639,420 is 4383540.
Find LCM of 196,686,639,420 with Prime Factorization
| 2 | 196, 686, 639, 420 |
| 2 | 98, 343, 639, 210 |
| 3 | 49, 343, 639, 105 |
| 7 | 49, 343, 213, 35 |
| 7 | 7, 49, 213, 5 |
| 1, 7, 213, 5 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 7 x 1 x 7 x 213 x 5 = 4383540
Therefore, the lowest common multiple of 196,686,639,420 is 4383540.
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.
196 x 686 x 639 x 420 = 36085301280
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.
196 : 1, 2, 4, 7, 14, 28, 49, 98, 196
686 : 1, 2, 7, 14, 49, 98, 343, 686
639 : 1, 3, 9, 71, 213, 639
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
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 196,686,639,420, is 1.
Now, the common factors can be found like this.
196:2x 2x 7x 7
686:2x 7x 7x 7
639:3x 3x 71
420:2x 2x 3x 5x 7
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 3x 7x 7x 7 = 8232
Therefore, the value for common factors is 8232.
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 = 36085301280/(1x8232)
LCM = 36085301280/8232
LCM = 4383540
Thus, we can understand that the LCM of 196,686,639,420 is 4383540.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 196, 686, 639, 420
1. What is the LCM of 196, 686, 639, 420?
Answer: LCM of 196, 686, 639, 420 is 4383540.
2. How to calculate the LCM of 196, 686, 639, 420?
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 196, 686, 639, 420.
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}.