LCM for 40 and 70

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 40 and 70?

Answer: LCM of 40 and 70 is 280

(Two hundred eighty)

Finding LCM for 40 and 70 using GCF's of these numbers

The first method to find LCM for numbers 40 and 70 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 40 and 70 is 10, so

LCM = (40 × 70) ÷ 10

LCM = 2800 ÷ 10

LCM = 280

Finding LCM for 40 and 70 by Listing Multiples

The second method to find LCM for numbers 40 and 70 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

Multiples of 70: 70, 140, 210, 280, 350, 420

So the LCM for 40 and 70 is 280

Finding LCM for 40 and 70 by Prime Factorization

Another method to find LCM for numbers 40 and 70 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 70: 2, 5, 7 (exponent form: 21, 51, 71)

23 × 51 × 71 = 280

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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 40 and 70? (The answer is: 280). Select the first number (e.g. '40') and the second number (e.g. '70'). 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
2570350
2670910
27701890
2870140
29702030
3070210
31702170
32701120
33702310
34701190
357070
36701260
37702590
38701330
39702730
4070280
41702870
4270210
43703010
44701540
4570630
46701610
47703290
48701680
4970490
5070350
51703570
52701820
53703710
54701890

FAQ

What's the Least Common Multiple (LCM) of 40 and 70?

LCM of 40 and 70 is 280

See Also