The GCF of 4 and 36 is 4. The LCM of 4 and 36 is 36.
Factors of 4: 1, 2, 4.
Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, 36.
Common factors: 1, 2 and 4. The greatest of these is 4.
4 = 2 × 2
36 = 2 × 2 × 3 × 3
GCF: multiply the prime factors both numbers share: 2 × 2 = 4.
LCM: multiply every prime the maximum number of times it appears in either number: 2 × 2 × 3 × 3 = 36.
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 4, so GCF(4, 36) = 4.
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, ...
Multiples of 36: 36, 72, ...
The first number in both lists is 36.
4 × 36 = 144 = 4 × 36. This always holds for two numbers, so you can find the LCM as (4 × 36) ÷ 4 = 36.
Divide the top and bottom by the GCF 4: 4/36 = 1/9.
| Numbers | GCF | LCM |
|---|---|---|
| 2 and 4 | 2 | 4 |
| 3 and 4 | 1 | 12 |
| 4 and 5 | 1 | 20 |
| 4 and 6 | 2 | 12 |
| 4 and 7 | 1 | 28 |
| 4 and 8 | 4 | 8 |
| 2 and 36 | 2 | 36 |
| 3 and 36 | 3 | 36 |
| 5 and 36 | 1 | 180 |
| 6 and 36 | 6 | 36 |
| 7 and 36 | 1 | 252 |
| 8 and 36 | 4 | 72 |
See also: factors of 4 · factors of 36.
Different numbers? Use the GCF and LCM calculator (any amount of numbers) or browse all GCF and LCM pairs.