LCM for 42 and 91

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 42 and 91?

Answer: LCM of 42 and 91 is 546

(Five hundred forty-six)

Finding LCM for 42 and 91 using GCF's of these numbers

The first method to find LCM for numbers 42 and 91 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 42 and 91 is 7, so

LCM = (42 × 91) ÷ 7

LCM = 3822 ÷ 7

LCM = 546

Finding LCM for 42 and 91 by Listing Multiples

The second method to find LCM for numbers 42 and 91 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 42: 42, 84, 126, 168, 210, 252, 294, 336, 378, 420, 462, 504, 546, 588, 630

Multiples of 91: 91, 182, 273, 364, 455, 546, 637, 728

So the LCM for 42 and 91 is 546

Finding LCM for 42 and 91 by Prime Factorization

Another method to find LCM for numbers 42 and 91 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 42: 2, 3, 7 (exponent form: 21, 31, 71)

All Prime Factors of 91: 7, 13 (exponent form: 71, 131)

21 × 31 × 71 × 131 = 546

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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 42 and 91? (The answer is: 546). Select the first number (e.g. '42') and the second number (e.g. '91'). 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
27912457
2891364
29912639
30912730
31912821
32912912
33913003
34913094
3591455
36913276
37913367
38913458
3991273
40913640
41913731
4291546
43913913
44914004
45914095
46914186
47914277
48914368
4991637
50914550
51914641
5291364
53914823
54914914
55915005
5691728

FAQ

What's the Least Common Multiple (LCM) of 42 and 91?

LCM of 42 and 91 is 546

See Also