What is the LCM of 42 and 66?

"Least Common Multiple" Calculator

What's the Least Common Multiple (LCM) of 42 and 66?

Answer: LCM of 42 and 66 is 462

(Four hundred sixty-two)

Finding LCM for 42 and 66 using GCF's of these numbers

The first method to find LCM for numbers 42 and 66 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 42 and 66 is 6, so

LCM = (42 × 66) ÷ 6

LCM = 2772 ÷ 6

LCM = 462

Finding LCM for 42 and 66 by Listing Multiples

The second method to find LCM for numbers 42 and 66 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

Multiples of 66: 66, 132, 198, 264, 330, 396, 462, 528, 594

So the LCM for 42 and 66 is 462

Finding LCM for 42 and 66 by Prime Factorization

Another method to find LCM for numbers 42 and 66 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 66: 2, 3, 11 (exponent form: 2¹, 3¹, 11¹)

2¹ × 3¹ × 7¹ × 11¹ = 462

Related Calculations

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 66? (The answer is: 462). Select the first number (e.g. '42') and the second number (e.g. '66'). 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

LCM Table

Number 1	Number 2	LCM
27	66	594
28	66	924
29	66	1914
30	66	330
31	66	2046
32	66	1056
33	66	66
34	66	1122
35	66	2310
36	66	396
37	66	2442
38	66	1254
39	66	858
40	66	1320
41	66	2706
42	66	462
43	66	2838
44	66	132
45	66	990
46	66	1518
47	66	3102
48	66	528
49	66	3234
50	66	1650
51	66	1122
52	66	1716
53	66	3498
54	66	594
55	66	330
56	66	1848

LCM for 42 and 66

"Least Common Multiple" Calculator

What's the Least Common Multiple (LCM) of 42 and 66?

Finding LCM for 42 and 66 using GCF's of these numbers

Finding LCM for 42 and 66 by Listing Multiples

Finding LCM for 42 and 66 by Prime Factorization

Related Calculations

See Also

About "Least Common Multiple" Calculator

"Least Common Multiple" Calculator

LCM Table

FAQ

What's the Least Common Multiple (LCM) of 42 and 66?

See Also