The GCF of 4 and 60 is 4. The LCM of 4 and 60 is 60.
Factors of 4: 1, 2, 4.
Factors of 60: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60.
Common factors: 1, 2 and 4. The greatest of these is 4.
4 = 2 × 2
60 = 2 × 2 × 3 × 5
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 × 5 = 60.
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, 60) = 4.
Multiples of 4: 4, 8, 12, 16, 20, 24, 28, 32, 36, ...
Multiples of 60: 60, 120, ...
The first number in both lists is 60.
4 × 60 = 240 = 4 × 60. This always holds for two numbers, so you can find the LCM as (4 × 60) ÷ 4 = 60.
Divide the top and bottom by the GCF 4: 4/60 = 1/15.
| 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 60 | 2 | 60 |
| 3 and 60 | 3 | 60 |
| 5 and 60 | 5 | 60 |
| 6 and 60 | 6 | 60 |
| 7 and 60 | 1 | 420 |
| 8 and 60 | 4 | 120 |
See also: factors of 4 · factors of 60.
Different numbers? Use the GCF and LCM calculator (any amount of numbers) or browse all GCF and LCM pairs.