LCM for 5 and 20

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 5 and 20?

Answer

LCM of 5 and 20 is 20

(Twenty)

Finding LCM for 5 and 20 using GCF of these numbers

The first method to find LCM for numbers 5 and 20 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 5 and 20 is 5, so

LCM = (5 × 20) ÷ 5

LCM = 100 ÷ 5

LCM = 20

Finding LCM for 5 and 20 by Listing Multiples

The second method to find LCM for numbers 5 and 20 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 5: 5, 10, 15, 20, 25, 30

Multiples of 20: 20, 40, 60

So the LCM for 5 and 20 is 20

Finding LCM for 5 and 20 by Prime Factorization

Another method to find LCM for numbers 5 and 20 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 5: 5 (exponent form: 51)

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

51 × 22 = 20

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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 5 and 20? (The answer is: 20). Select the first number (e.g. '5') and the second number (e.g. '20'). 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
5420
5630
5735
5840
5945
51010
51155
51260
51365
51470
51515
51680
51785
51890
51995
52020
521105
522110
524120
52525
526130
527135
53030
531155
532160
53535
539195
54040
542210
544220

FAQ

What's the Least Common Multiple (LCM) of 5 and 20?

LCM of 5 and 20 is 20

How to find the LCM of 5 and 20 using prime factorization?

To find the LCM of 5 and 20, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 20.

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 5 and 20: LCM = 20, GCF = 5.

See Also