The GCF of 2 and 6 is 2. The LCM of 2 and 6 is 6.
Factors of 2: 1, 2.
Factors of 6: 1, 2, 3, 6.
Common factors: 1 and 2. The greatest of these is 2.
2 = 2 (prime)
6 = 2 × 3
GCF: multiply the prime factors both numbers share: 2 = 2.
LCM: multiply every prime the maximum number of times it appears in either number: 2 × 3 = 6.
Divide the larger number by the smaller and repeat with the remainder until it is 0. The last non-zero remainder is the GCF.
The last non-zero remainder is 2, so GCF(2, 6) = 2.
Multiples of 2: 2, 4, 6, 8, ...
Multiples of 6: 6, 12, ...
The first number in both lists is 6.
2 × 6 = 12 = 2 × 6. This always holds for two numbers, so you can find the LCM as (2 × 6) ÷ 2 = 6.
Divide the top and bottom by the GCF 2: 2/6 = 1/3.
| Numbers | GCF | LCM |
|---|---|---|
| 2 and 3 | 1 | 6 |
| 2 and 4 | 2 | 4 |
| 2 and 5 | 1 | 10 |
| 2 and 7 | 1 | 14 |
| 2 and 8 | 2 | 8 |
| 2 and 9 | 1 | 18 |
| 3 and 6 | 3 | 6 |
| 4 and 6 | 2 | 12 |
| 5 and 6 | 1 | 30 |
| 6 and 7 | 1 | 42 |
| 6 and 8 | 2 | 24 |
| 6 and 9 | 3 | 18 |
See also: factors of 2 · factors of 6 · 2/6 as a decimal.
Different numbers? Use the GCF and LCM calculator (any amount of numbers) or browse all GCF and LCM pairs.