List all the factors that several numbers share.
Common factors are the numbers that divide every number in the list. The common factors of 24, 36 and 60 are 1, 2, 3, 4, 6, 12.
Common factors are the factors that two or more numbers have in common. Enter your numbers to see every shared factor, the greatest common factor, whether the numbers are coprime and a table of all the factors of each number.
The largest common factor is the GCF, and every common factor divides it. See the GCF Calculator, Factor Calculator and LCM Calculator.
The calculator applies the standard method step by step.
| Item | Value |
|---|---|
| Common factors | 1, 2, 3, 4, 6, 12 |
| Greatest common factor (GCF) | 12 |
| Number of common factors | 6 |
| Coprime (only common factor is 1)? | No |
| Number | All factors |
|---|---|
| 24 | 1, 2, 3, 4, 6, 8, 12, 24 |
| 36 | 1, 2, 3, 4, 6, 9, 12, 18, 36 |
| 60 | 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 |
| Numbers | Common factors |
|---|---|
| 12 and 18 | 1, 2, 3, 6 |
| 24, 36, 60 | 1, 2, 3, 4, 6, 12 |
| 8 and 15 | 1 |
| 30 and 45 | 1, 3, 5, 15 |
| 100 and 250 | 1, 2, 5, 10, 25, 50 |
Numbers that divide two or more given numbers without a remainder.
List the factors of each number and pick those that appear in all lists, or list the factors of the GCF.
1, 2, 3 and 6.
The GCF is the biggest common factor. All common factors divide the GCF.
Numbers whose only common factor is 1, such as 8 and 15.
They let you simplify fractions and split things into equal groups.
It uses the standard method: common factors = all divisors of gcd(a, b, …) The full working and a worked example are shown on this page.
Decimal results use standard double-precision arithmetic (about 15–16 significant digits). Tools that work with whole numbers — big numbers, factors, bases, combinations — use exact integer arithmetic, so no digits are lost.
Yes for checking your work and learning the method. The steps and formula are shown so you can understand the answer, but follow your teacher's rules about calculators in exams.
No. Everything is calculated in your browser and nothing you enter is uploaded or saved.
