LCM of 990, 931, 420, 971
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 990, 931, 420, 971 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 990, 931, 420, 971. So, keep reading to learn more.
Given numbers are 990,931,420,971
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 990,931,420,971 is 1789921980.
Find LCM of 990,931,420,971 with Prime Factorization
| 2 | 990, 931, 420, 971 |
| 3 | 495, 931, 210, 971 |
| 5 | 165, 931, 70, 971 |
| 7 | 33, 931, 14, 971 |
| 33, 133, 2, 971 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 7 x 33 x 133 x 2 x 971 = 1789921980
Therefore, the lowest common multiple of 990,931,420,971 is 1789921980.
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.
990 x 931 x 420 x 971 = 375883615800
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.
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
931 : 1, 7, 19, 49, 133, 931
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
971 : 1, 971
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 990,931,420,971, is 1.
Now, the common factors can be found like this.
990:2x 3x 3x 5x 11
931:7x 7x 19
420:2x 2x 3x 5x 7
971:971
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 5x 7 = 210
Therefore, the value for common factors is 210.
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 = 375883615800/(1x210)
LCM = 375883615800/210
LCM = 1789921980
Thus, we can understand that the LCM of 990,931,420,971 is 1789921980.
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FAQs on LCM of 990, 931, 420, 971
1. What is the LCM of 990, 931, 420, 971?
Answer: LCM of 990, 931, 420, 971 is 1789921980.
2. How to calculate the LCM of 990, 931, 420, 971?
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 990, 931, 420, 971.
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}.