LCM of 89, 79, 28, 70, 705
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 89, 79, 28, 70, 705 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 89, 79, 28, 70, 705. So, keep reading to learn more.
Given numbers are 89,79,28,70,705
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 89,79,28,70,705 is 138791940.
Find LCM of 89,79,28,70,705 with Prime Factorization
| 2 | 89, 79, 28, 70, 705 |
| 5 | 89, 79, 14, 35, 705 |
| 7 | 89, 79, 14, 7, 141 |
| 89, 79, 2, 1, 141 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 89 x 79 x 2 x 1 x 141 = 138791940
Therefore, the lowest common multiple of 89,79,28,70,705 is 138791940.
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.
89 x 79 x 28 x 70 x 705 = 9715435800
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.
89 : 1, 89
79 : 1, 79
28 : 1, 2, 4, 7, 14, 28
70 : 1, 2, 5, 7, 10, 14, 35, 70
705 : 1, 3, 5, 15, 47, 141, 235, 705
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 89,79,28,70,705, is 1.
Now, the common factors can be found like this.
89:89
79:79
28:2x 2x 7
70:2x 5x 7
705:3x 5x 47
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 7 = 70
Therefore, the value for common factors is 70.
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 = 9715435800/(1x70)
LCM = 9715435800/70
LCM = 138791940
Thus, we can understand that the LCM of 89,79,28,70,705 is 138791940.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 89, 79, 28, 70, 705
1. What is the LCM of 89, 79, 28, 70, 705?
Answer: LCM of 89, 79, 28, 70, 705 is 138791940.
2. How to calculate the LCM of 89, 79, 28, 70, 705?
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 89, 79, 28, 70, 705.
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}.