Given numbers are 638,738,206,420

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

The LCM of 638,738,206,420 is 1697392620.

Find LCM of 638,738,206,420 with Prime Factorization

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

2 x 3 x 319 x 123 x 103 x 70 = 1697392620

Therefore, the lowest common multiple of 638,738,206,420 is 1697392620.

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.

638 x 738 x 206 x 420 = 40737422880

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.

638 : 1, 2, 11, 22, 29, 58, 319, 638

738 : 1, 2, 3, 6, 9, 18, 41, 82, 123, 246, 369, 738

206 : 1, 2, 103, 206

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

2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,738,206,420, is 2.

Now, the common factors can be found like this.

638:2x 11x 29

738:2x 3x 3x 41

206:2x 103

420:2x 2x 3x 5x 7

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

2x 2x 3 = 12

Therefore, the value for common factors is 12.

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 = 40737422880/(2x12)

LCM = 40737422880/24

LCM = 1697392620

Thus, we can understand that the LCM of 638,738,206,420 is 1697392620.

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

• LCM of 416, 374, 666, 173
• LCM of 245, 512, 425, 326
• LCM of 548, 323, 295, 492
• LCM of 201, 151, 485, 511
• LCM of 399, 792, 216, 164

1. What is the LCM of 638, 738, 206, 420?

Answer: LCM of 638, 738, 206, 420 is 1697392620.

2. How to calculate the LCM of 638, 738, 206, 420?

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 638, 738, 206, 420.

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}.