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LCM for 8 and 5

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 8 and 5?

Answer

LCM of 8 and 5 is 40

(Forty)

Finding LCM for 8 and 5 using GCF of these numbers

The first method to find LCM for numbers 8 and 5 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 8 and 5 is 1, so

LCM = (8 × 5) ÷ 1

LCM = 40 ÷ 1

LCM = 40

Finding LCM for 8 and 5 by Listing Multiples

The second method to find LCM for numbers 8 and 5 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 8: 8, 16, 24, 32, 40, 48, 56

Multiples of 5: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50

So the LCM for 8 and 5 is 40

Finding LCM for 8 and 5 by Prime Factorization

Another method to find LCM for numbers 8 and 5 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 8: 2, 2, 2 (exponent form: 23)

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

23 × 51 = 40

Related Calculations

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What is the LCM of 8 and 5?. The LCM of 8 and 5 is 40 — the smallest common multiple of both integers.
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LCM Table

Number 1Number 2LCM
828
8324
848
8540
8624
8972
81040
81188
81224
813104
81456
815120
81616
817136
81872
82040
821168
82288
82424
825200
826104
827216
82856
830120
83232
833264
835280
83672
84040
841328

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 8 and 5? (The answer is: 40). Select the first number (e.g. '8') and the second number (e.g. '5'). 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

FAQ

What's the Least Common Multiple (LCM) of 8 and 5?

LCM of 8 and 5 is 40

How to find the LCM of 8 and 5 using prime factorization?

To find the LCM of 8 and 5, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 40.

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 8 and 5: LCM = 40, GCF = 1.

See Also