Euclid's Division Lemma Prime Factorisation Calculator Factors of a Number Calculator LCM Calculator GCF Calculator Factor Tree Calculator LCM of Decimals LCM of Fractions GCF of Decimals GCF of Fractions

Least Common Multiple of 21, 28, 35

Use the LCM of two or more numbers Calculator to find the Least Common Multiple of numbers 21, 28, 35 i.e. 420 smallest integer divisible by all numbers.

Least common multiple (LCM) of 21, 28, 35 is 420.

LCM(21, 28, 35) = 420

LCM of 21, 28, 35

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

LCM of:

Least Common Multiple (LCM) of 21,28,35 By Common Division

7 21, 28, 35
3, 4, 5

∴ So the LCM of the given numbers is 7 x 3 x 4 x 5 = 420

Least Common Multiple of 21,28,35 with GCF Formula

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

We need to calculate greatest common factor of 21,28,35 and common factors if more than two numbers have common factor, than apply into the LCM equation.

GCF(21,28,35) = 7

common factors(in case of two or more numbers have common factors) = 7

GCF(21,28,35) x common factors =7 x 7 = 49

LCM(21,28,35) = ( 21 × 28 × 35 ) / 49

LCM(21,28,35) = 20580 / 49

LCM(21,28,35) = 420

∴ Least Common Multiple of 21,28,35 is 420

LCM of two or more Numbers Calculation Examples

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

Frequently Asked Questions on LCM of 21, 28, 35

1. What is the LCM of 21, 28, 35?

Answer: LCM of 21, 28, 35 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 21, 28, 35 ?

Least Common Multiple of 21, 28, 35.

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, 28, 35) = 2 x 2 x 3 x 5 x 7 = 420.