Number Theory Calculators — Mathematics
Greatest common divisor, least common multiple, prime factorization, modular arithmetic, and divisibility tests. Our number theory tools expose the factor trees and remainder steps behind each answer, useful for both coursework and cryptography prep.
All Number Theory Calculators
Calculate abundant number checker with inputs, formulas, and instant results.
Calculate bell numbers with inputs, formulas, and instant results.
Calculate bezout identity with inputs, formulas, and instant results.
binary calculator. Get instant, accurate results.
Calculate the nth Catalan number with applications to counting problems.
Calculate catalan numbers with inputs, formulas, and instant results.
Calculate deficient number checker with inputs, formulas, and instant results.
Check divisibility of a number by 2 through 12 and find all factors.
Calculate divisor function with inputs, formulas, and instant results.
Calculate Euler totient function for any positive integer with prime factorization.
Calculate eulers totient function with inputs, formulas, and instant results.
Calculate extended euclidean algorithm with inputs, formulas, and instant results.
Calculate factorization visualizer with inputs, formulas, and instant results.
Calculate fibonacci closed form with inputs, formulas, and instant results.
gcf/gcd calculator. Get instant, accurate results.
Calculate properties of graphs including degree, adjacency matrix, and shortest paths.
Find the GCF (GCD) of two or more numbers using prime factorization and Euclidean algorithm.
hexadecimal calculator. Get instant, accurate results.
Find the LCM of two or more numbers using prime factorization and the GCF method.
Calculate mersenne prime finder with inputs, formulas, and instant results.
Test if large numbers are prime using the Miller-Rabin probabilistic primality test.
Perform modular arithmetic operations including modular exponentiation and inverse.
Calculate modular arithmetic visualizer with inputs, formulas, and instant results.
Calculate partition function with inputs, formulas, and instant results.
Generate rows of Pascal triangle and find specific binomial coefficients.
Calculate pascals triangle with inputs, formulas, and instant results.
Calculate perfect number checker with inputs, formulas, and instant results.
Calculate prime counting function with inputs, formulas, and instant results.
Perform union, intersection, difference, and complement operations on sets.
Calculate Stirling numbers of the first and second kind for combinatorial problems.
Check SPF, DKIM, and DMARC readiness for inbox placement
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About Number Theory Calculators
Greatest common divisor, least common multiple, prime factorization, modular arithmetic, and divisibility tests. Our number theory tools expose the factor trees and remainder steps behind each answer, useful for both coursework and cryptography prep.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common number theory scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 32tools: Abundant Number Checker, Bell Numbers Calculator, Bezout Identity Calculator, Binary Calculator - Operations, Catalan Number Calculator, Catalan Numbers Calculator, Deficient Number Checker, Divisibility Calculator, and 24 more. Each calculator is free to use with no signup required.