Given numbers are 31,23,21,72,121

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

The LCM of 31,23,21,72,121 is 43481592.

Find LCM of 31,23,21,72,121 with Prime Factorization

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

3 x 31 x 23 x 7 x 24 x 121 = 43481592

Therefore, the lowest common multiple of 31,23,21,72,121 is 43481592.

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.

31 x 23 x 21 x 72 x 121 = 130444776

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.

31 : 1, 31

23 : 1, 23

21 : 1, 3, 7, 21

72 : 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72

121 : 1, 11, 121

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 31,23,21,72,121, is 1.

Now, the common factors can be found like this.

31:31

23:23

21:3x 7

72:2x 2x 2x 3x 3

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.

3 = 3

Therefore, the value for common factors is 3.

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 = 130444776/(1x3)

LCM = 130444776/3

LCM = 43481592

Thus, we can understand that the LCM of 31,23,21,72,121 is 43481592.

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

• LCM of 69, 91, 15, 88, 271
• LCM of 30, 28, 15, 51, 334
• LCM of 11, 74, 81, 94, 656
• LCM of 82, 66, 31, 58, 543
• LCM of 78, 53, 84, 79, 581

1. What is the LCM of 31, 23, 21, 72, 121?

Answer: LCM of 31, 23, 21, 72, 121 is 43481592.

2. How to calculate the LCM of 31, 23, 21, 72, 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 31, 23, 21, 72, 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}.