LCM for 40 and 45

What's the Least Common Multiple (LCM) of 40 and 45?

Answer: LCM of 40 and 45 is 360

(Three hundred sixty)

Finding LCM for 40 and 45 using GCF's of these numbers

The first method to find LCM for numbers 40 and 45 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 40 and 45 is 5, so

LCM = (40 × 45) ÷ 5

LCM = 1800 ÷ 5

LCM = 360

Finding LCM for 40 and 45 by Listing Multiples

The second method to find LCM for numbers 40 and 45 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 40: 40, 80, 120, 160, 200, 240, 280, 320, 360, 400, 440

Multiples of 45: 45, 90, 135, 180, 225, 270, 315, 360, 405, 450

So the LCM for 40 and 45 is 360

Finding LCM for 40 and 45 by Prime Factorization

Another method to find LCM for numbers 40 and 45 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 40: 2, 2, 2, 5 (exponent form: 23, 51)

All Prime Factors of 45: 3, 3, 5 (exponent form: 32, 51)

23 × 51 × 32 = 360

LCM Table

Number 1Number 2LCM
2545
26451170
2745
28451260
29451305
3045
31451395
3245
3345495
34451530
3545
3645
37451665
38451710
3945585
4045
41451845
4245
43451935
44451980
454545
46452070
47452115
4845720
49452205
5045450
5145765
52452340
53452385
5445270

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 40 and 45? (The answer is: 360). Select the first number (e.g. '40') and the second number (e.g. '45'). 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

FAQ

What's the Least Common Multiple (LCM) of 40 and 45?

LCM of 40 and 45 is 360