Use the LCM of two or more numbers Calculator to find the Least Common Multiple of numbers 20, 30, 70 i.e. 420 smallest integer divisible by all numbers.

Least common multiple (LCM) of 20, 30, 70 is **420**.

LCM(20, 30, 70) = 420

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

- Least Common Multiple of 20, 30, 70 by common division method
- Least Common Multiple of 20, 30, 70 with GCF Formula

2 | 20, 30, 70 |

5 | 10, 15, 35 |

2, 3, 7 |

∴ So the LCM of the given numbers is 2 x 5 x 2 x 3 x 7 = 420

The formula of **LCM** is LCM(a_{1},a_{2},a_{3}....,a_{n}) = ( a_{1} × a_{2} × a_{3} × .... × a_{n}) / GCF(a_{1},a_{2},a_{3}....,a_{n}) x common factors(if more than 2 numbers have common factors).

We need to calculate greatest common factor of 20,30,70 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(20,30,70) = 10

common factors(in case of two or more numbers have common factors) = 10

GCF(20,30,70) x common factors =10 x 10 = 100

LCM(20,30,70) = ( 20 × 30 × 70 ) / 100

LCM(20,30,70) = 42000 / 100

LCM(20,30,70) = 420

∴ Least Common Multiple of 20,30,70 is 420

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

1. What is the LCM of 20, 30, 70?

Answer: LCM of 20, 30, 70 is 420.

2. What are the Factors of 420?

Answer: Factors of 420 are . There are integers that are factors of 420

3. How to Find the LCM of 20, 30, 70 ?

Least Common Multiple of 20, 30, 70.

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(20, 30, 70) = 2 x 2 x 3 x 5 x 7 = 420.