Given numbers are 661,686,212,645

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

The LCM of 661,686,212,645 is 31002103020.

Find LCM of 661,686,212,645 with Prime Factorization

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

2 x 661 x 343 x 106 x 645 = 31002103020

Therefore, the lowest common multiple of 661,686,212,645 is 31002103020.

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.

661 x 686 x 212 x 645 = 62004206040

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.

661 : 1, 661

686 : 1, 2, 7, 14, 49, 98, 343, 686

212 : 1, 2, 4, 53, 106, 212

645 : 1, 3, 5, 15, 43, 129, 215, 645

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 661,686,212,645, is 1.

Now, the common factors can be found like this.

661:661

686:2x 7x 7x 7

212:2x 2x 53

645:3x 5x 43

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

2 = 2

Therefore, the value for common factors is 2.

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 = 62004206040/(1x2)

LCM = 62004206040/2

LCM = 31002103020

Thus, we can understand that the LCM of 661,686,212,645 is 31002103020.

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

• LCM of 225, 729, 844, 587
• LCM of 455, 196, 291, 210
• LCM of 733, 841, 144, 580
• LCM of 766, 304, 858, 828
• LCM of 617, 672, 859, 233

1. What is the LCM of 661, 686, 212, 645?

Answer: LCM of 661, 686, 212, 645 is 31002103020.

2. How to calculate the LCM of 661, 686, 212, 645?

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 661, 686, 212, 645.

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}.