Number Theory Calculators
5 free number theory calculators in the Mathematics category. Each tool gives instant results and explains the formula so you can follow the calculation.
Factorial Calculator
n! = n x (n-1) x ... x 1
Open calculator โFibonacci Calculator
F(n) = F(n-1) + F(n-2), starting 0, 1
Open calculator โHCF/GCD Calculator
GCD via Euclid's algorithm; LCM = product / GCD pairwise
Open calculator โLCM Calculator
GCD via Euclid's algorithm; LCM = product / GCD pairwise
Open calculator โPrime Factorization Calculator
Trial division to express n as a product of primes
Open calculator โAbout number theory calculations
This page groups the number theory tools within Mathematics. Pick a calculator above to enter your values and get an instant result, complete with the formula, a step-by-step breakdown and a worked example. All calculators are mobile-friendly, accessible and free.
What are number theory calculators used for?
These tools help you with number theory calculations in the mathematics category, giving instant results with the formula and a worked example on each page.
Are they free and private?
Yes. They are free, require no sign-up, and run entirely in your browser so your inputs stay on your device.