LCM of 140, 788, 561, 420
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 140, 788, 561, 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 140, 788, 561, 420. So, keep reading to learn more.
Given numbers are 140,788,561,420
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 140,788,561,420 is 15472380.
Find LCM of 140,788,561,420 with Prime Factorization
| 2 | 140, 788, 561, 420 |
| 2 | 70, 394, 561, 210 |
| 3 | 35, 197, 561, 105 |
| 5 | 35, 197, 187, 35 |
| 7 | 7, 197, 187, 7 |
| 1, 197, 187, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 7 x 1 x 197 x 187 x 1 = 15472380
Therefore, the lowest common multiple of 140,788,561,420 is 15472380.
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.
140 x 788 x 561 x 420 = 25993598400
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.
140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
788 : 1, 2, 4, 197, 394, 788
561 : 1, 3, 11, 17, 33, 51, 187, 561
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 140,788,561,420, is 1.
Now, the common factors can be found like this.
140:2x 2x 5x 7
788:2x 2x 197
561:3x 11x 17
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 2x 3x 5x 7 = 1680
Therefore, the value for common factors is 1680.
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 = 25993598400/(1x1680)
LCM = 25993598400/1680
LCM = 15472380
Thus, we can understand that the LCM of 140,788,561,420 is 15472380.
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FAQs on LCM of 140, 788, 561, 420
1. What is the LCM of 140, 788, 561, 420?
Answer: LCM of 140, 788, 561, 420 is 15472380.
2. How to calculate the LCM of 140, 788, 561, 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 140, 788, 561, 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}.