LCM of 420, 905, 178, 979, 919
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 420, 905, 178, 979, 919 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, 905, 178, 979, 919. So, keep reading to learn more.
Given numbers are 420,905,178,979,919
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 420,905,178,979,919 is 68395270020.
Find LCM of 420,905,178,979,919 with Prime Factorization
| 2 | 420, 905, 178, 979, 919 |
| 5 | 210, 905, 89, 979, 919 |
| 89 | 42, 181, 89, 979, 919 |
| 42, 181, 1, 11, 919 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 89 x 42 x 181 x 1 x 11 x 919 = 68395270020
Therefore, the lowest common multiple of 420,905,178,979,919 is 68395270020.
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 905 x 178 x 979 x 919 = 60871790317800
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
905 : 1, 5, 181, 905
178 : 1, 2, 89, 178
979 : 1, 11, 89, 979
919 : 1, 919
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 420,905,178,979,919, is 1.
Now, the common factors can be found like this.
420:2x 2x 3x 5x 7
905:5x 181
178:2x 89
979:11x 89
919:919
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 89 = 890
Therefore, the value for common factors is 890.
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 = 60871790317800/(1x890)
LCM = 60871790317800/890
LCM = 68395270020
Thus, we can understand that the LCM of 420,905,178,979,919 is 68395270020.
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FAQs on LCM of 420, 905, 178, 979, 919
1. What is the LCM of 420, 905, 178, 979, 919?
Answer: LCM of 420, 905, 178, 979, 919 is 68395270020.
2. How to calculate the LCM of 420, 905, 178, 979, 919?
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, 905, 178, 979, 919.
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}.