LCM for 20 and 210

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 20 and 210?

Answer

LCM of 20 and 210 is 420

(Four hundred twenty)

Finding LCM for 20 and 210 using GCF of these numbers

The first method to find LCM for numbers 20 and 210 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 20 and 210 is 10, so

LCM = (20 × 210) ÷ 10

LCM = 4200 ÷ 10

LCM = 420

Finding LCM for 20 and 210 by Listing Multiples

The second method to find LCM for numbers 20 and 210 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460

Multiples of 210: 210, 420, 630, 840

So the LCM for 20 and 210 is 420

Finding LCM for 20 and 210 by Prime Factorization

Another method to find LCM for numbers 20 and 210 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 20: 2, 2, 5 (exponent form: 22, 51)

All Prime Factors of 210: 2, 3, 5, 7 (exponent form: 21, 31, 51, 71)

22 × 51 × 31 × 71 = 420

Related Calculations

See Also

About "Least Common Multiple" Calculator

This calculator will help you find the Least Common Multiple (LCM) of two numbers. For example, it can help you find out what's the Least Common Multiple (LCM) of 20 and 210? (The answer is: 420). Select the first number (e.g. '20') and the second number (e.g. '210'). After that hit the 'Calculate' button.
Least Common Multiple (LCM) also known as the Lowest Common Multiple or Smallest Common Multiple of 2 numbers - it is the smallest positive integer that is divisible by both numbers

"Least Common Multiple" Calculator

Least Common Multiple of

and

LCM Table

Number 1Number 2LCM
20531060
2054540
2055220
2058580
206060
20100100
20125500
20135540
20145580
20150300
20160160
20165660
20170340
20175700
20190380
20210420
20220220
20225900
20230460
202551020
202751100
202851140
20290580
202951180
203051220
203251300
203351340
203551420
20400400
20410820

FAQ

What's the Least Common Multiple (LCM) of 20 and 210?

LCM of 20 and 210 is 420

How to find the LCM of 20 and 210 using prime factorization?

To find the LCM of 20 and 210, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 420.

What is the difference between LCM and GCF?

LCM (Least Common Multiple) is the smallest number divisible by both numbers, while GCF (Greatest Common Factor) is the largest number that divides both. For 20 and 210: LCM = 420, GCF = 10.

See Also