Using the Common Factor Calculator
Common factors identify the sizes of equal groups that work for both quantities. They are also useful for checking how far a fraction can be simplified without changing its value.
Worked example
Use the example inputs below to reproduce this result. These are the form's starting values, not recommended targets. Changing your inputs updates your result above; this worked example stays fixed for comparison. Results are rounded for display.
Example inputs
- Integer
- 60
- Second integer
- 48
Example result
- Factors
- 1, 2, 3, 4, 6, 12
Method and assumptions
Whole numbers only. Factors divide a number exactly. LCM(a,b) = a × b / GCF(a,b).
Keep exact values exact
Whole-number problems often need an exact answer rather than a rounded decimal. Check the permitted range and input notation before pasting a large number. A leading minus sign, a decimal point or a base prefix can change whether an entry is valid. Where the tool returns an exact integer or factorization, preserve that form for later calculations.
Common question
Why is one always in the list?
One divides every integer exactly. Two positive integers with no larger shared factor are called coprime, even when neither individual number is prime.
Guide updated .