Given numbers are 20,49,69,391

The least common multiple of numbers can be find using the prime factorization method or LCM formula.

The LCM of 20,49,69,391 is 1149540.

Find LCM of 20,49,69,391 with Prime Factorization

Multiply the prime numbers at the bottom and the left side.

23 x 20 x 49 x 3 x 17 = 1149540

Therefore, the lowest common multiple of 20,49,69,391 is 1149540.

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.

20 x 49 x 69 x 391 = 26439420

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.

20 : 1, 2, 4, 5, 10, 20

49 : 1, 7, 49

69 : 1, 3, 23, 69

391 : 1, 17, 23, 391

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 20,49,69,391, is 1.

Now, the common factors can be found like this.

20:2x 2x 5

49:7x 7

69:3x 23

391:17x 23

From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.

23 = 23

Therefore, the value for common factors is 23.

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 = 26439420/(1x23)

LCM = 26439420/23

LCM = 1149540

Thus, we can understand that the LCM of 20,49,69,391 is 1149540.

Here are some samples of LCM of two or more Numbers calculations.

• LCM of 14, 69, 14, 893
• LCM of 12, 24, 65, 160
• LCM of 80, 89, 67, 134
• LCM of 22, 94, 41, 430
• LCM of 74, 47, 24, 968

1. What is the LCM of 20, 49, 69, 391?

Answer: LCM of 20, 49, 69, 391 is 1149540.

2. How to calculate the LCM of 20, 49, 69, 391?

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 20, 49, 69, 391.

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}.