Least Common Multiple of 21, 35, 72, 686

Least common multiple or lowest common denominator (lcd) can be calculated in three ways

• Least Common Multiple of 21, 35, 72, 686 by common division method
• Least Common Multiple of 21, 35, 72, 686 with GCF Formula

∴ So the LCM of the given numbers is 2 x 3 x 7 x 1 x 5 x 12 x 49 = 123480

The formula of LCM is LCM(a₁,a₂,a₃....,a_n) = ( a₁ × a₂ × a₃ × .... × a_n) / GCF(a₁,a₂,a₃....,a_n) x common factors(if more than 2 numbers have common factors).

We need to calculate greatest common factor of 21,35,72,686 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(21,35,72,686) = 1

common factors(in case of two or more numbers have common factors) = 294

GCF(21,35,72,686) x common factors =1 x 294 = 294

LCM(21,35,72,686) = ( 21 × 35 × 72 × 686 ) / 294

LCM(21,35,72,686) = 36303120 / 294

LCM(21,35,72,686) = 123480

∴ Least Common Multiple of 21,35,72,686 is 123480

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

• LCM of 31, 91, 76, 934
• LCM of 70, 39, 25, 754
• LCM of 50, 43, 71, 172
• LCM of 60, 90, 42, 575
• LCM of 83, 23, 73, 778

1. What is the LCM of 21, 35, 72, 686?

Answer: LCM of 21, 35, 72, 686 is 123480.

2. What are the Factors of 123480?

Answer: Factors of 123480 are . There are integers that are factors of 123480

3. How to Find the LCM of 21, 35, 72, 686 ?

Least Common Multiple of 21, 35, 72, 686.

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors with last row quotient of common division that is LCM(21, 35, 72, 686) = 2 x 2 x 2 x 3 x 3 x 5 x 7 x 7 x 7 = 123480.