LCM of 971, 840, 154, 785, 121
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 971, 840, 154, 785, 121 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 971, 840, 154, 785, 121. So, keep reading to learn more.
Given numbers are 971,840,154,785,121
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 971,840,154,785,121 is 15494713080.
Find LCM of 971,840,154,785,121 with Prime Factorization
| 2 | 971, 840, 154, 785, 121 |
| 5 | 971, 420, 77, 785, 121 |
| 7 | 971, 84, 77, 157, 121 |
| 11 | 971, 12, 11, 157, 121 |
| 971, 12, 1, 157, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 11 x 971 x 12 x 1 x 157 x 11 = 15494713080
Therefore, the lowest common multiple of 971,840,154,785,121 is 15494713080.
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.
971 x 840 x 154 x 785 x 121 = 11930929071600
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.
971 : 1, 971
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
154 : 1, 2, 7, 11, 14, 22, 77, 154
785 : 1, 5, 157, 785
121 : 1, 11, 121
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 971,840,154,785,121, is 1.
Now, the common factors can be found like this.
971:971
840:2x 2x 2x 3x 5x 7
154:2x 7x 11
785:5x 157
121:11x 11
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 7x 11 = 770
Therefore, the value for common factors is 770.
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 = 11930929071600/(1x770)
LCM = 11930929071600/770
LCM = 15494713080
Thus, we can understand that the LCM of 971,840,154,785,121 is 15494713080.
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FAQs on LCM of 971, 840, 154, 785, 121
1. What is the LCM of 971, 840, 154, 785, 121?
Answer: LCM of 971, 840, 154, 785, 121 is 15494713080.
2. How to calculate the LCM of 971, 840, 154, 785, 121?
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 971, 840, 154, 785, 121.
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}.