LCM for 8 and 40

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 8 and 40?

Answer

LCM of 8 and 40 is 40

(Forty)

Finding LCM for 8 and 40 using GCF of these numbers

The first method to find LCM for numbers 8 and 40 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 8 and 40 is 8, so

LCM = (8 × 40) ÷ 8

LCM = 320 ÷ 8

LCM = 40

Finding LCM for 8 and 40 by Listing Multiples

The second method to find LCM for numbers 8 and 40 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 40: 40, 80, 120

So the LCM for 8 and 40 is 40

Finding LCM for 8 and 40 by Prime Factorization

Another method to find LCM for numbers 8 and 40 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 40: 2, 2, 2, 5 (exponent form: 23, 51)

23 × 51 = 40

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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 8 and 40? (The answer is: 40). Select the first number (e.g. '8') and the second number (e.g. '40'). 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
14040
24040
340120
44040
54040
640120
740280
84040
940360
104040
1140440
1240120
1340520
1440280
1540120
164080
1740680
1840360
1940760
204040
2140840
2240440
2340920
2440120
2540200
2640520
27401080
2840280
29401160
3040120

FAQ

What's the Least Common Multiple (LCM) of 8 and 40?

LCM of 8 and 40 is 40

How to find the LCM of 8 and 40 using prime factorization?

To find the LCM of 8 and 40, 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 40: LCM = 40, GCF = 8.

See Also