Practical tools for measured work
Factor calculator
Find prime factors, positive divisors, greatest common divisor and exact least common multiple.
Calculate the layout, check the diagram, then print the result for the shop or jobsite.
2^2 × 3^1
Positive divisors
| Divisor |
|---|
| 1 |
| 2 |
| 3 |
| 4 |
| 6 |
| 12 |
How it works
Factor the first integer into primes, enumerate its positive divisors, and compare both integers for GCD and LCM. For 12 and 18, GCD = 6 and LCM = 36. The divisors of 12 are 1, 2, 3, 4, 6 and 12.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Integer to factor
- 12
- Second integer for GCD and LCM
- 18
Primary result: Greatest common divisor: 6.
Before using the result
- Check the selected mode, units and input values before using the result.
- Read the assumptions and rounding rules; compare the worked example with your intended calculation.
- A numerical result does not supply missing context or change the stated limitations.
Limitations
Both inputs must be positive whole numbers no greater than one trillion. Zero and negative divisor conventions are excluded. LCM is returned as an exact integer even when it exceeds ordinary floating-point integer precision.
Frequently asked questions
Are the displayed decimals exact?
Fractions, combinations and integer multiples use exact integer arithmetic. Other results use floating-point arithmetic and are rounded for display. Keep the exact fraction when a repeating decimal matters.
Related tools
Fraction calculator
Convert decimals and mixed numbers to exact fractions and perform fraction arithmetic.
Logarithm calculator
Calculate a real logarithm with an explicit positive base and argument.
Power and root calculator
Square numbers, raise powers and compute real nth roots with domain validation.
Random number generator
Generate bounded random integers with optional unique results using browser crypto.