Factor Calculator

Factor Calculator is a clean, fast tool for working with the factors of whole numbers — completely offline. Enter a number to see every divisor at a glance, or enter two numbers to find their greatest common factor and least common multiple. Whether you are a student checking homework, a teacher building examples, or just curious, the answer appears the moment you type.

WHAT YOU CAN DO
• List every positive factor (divisor) of a number
• See the factor pairs that multiply back to it
• Get the count and sum of all factors
• Check whether a number is prime and whether it is perfect
• Read the prime factorization, like 24 = 2 x 2 x 2 x 3
• Find the GCF (GCD) and LCM of two numbers
• See all the factors two numbers share

FACTORS, MADE CLEAR
The Factors tab lays out every divisor as a tidy grid of chips, lists the factor pairs, and summarises the key facts in tinted tiles. Try 24 and you will see 8 factors — 1, 2, 3, 4, 6, 8, 12, 24 — that add up to 60.

GCF AND LCM
The GCF & LCM tab uses Euclid's algorithm for an instant greatest common factor, then the least common multiple, plus the list of common factors. For 24 and 36 the GCF is 12 and the LCM is 72.

LEARN AS YOU GO
A built-in Learn tab explains, in plain language, what factors and divisors are, how the GCF differs from the LCM and where each is used, and the difference between prime and composite numbers.

PRIVACY
The app collects no personal data and works fully offline — your calculations never leave your device. Ads are served by Google AdMob, which may use an advertising identifier as described in Google's policies.

EDUCATIONAL USE
Results are provided for learning and reference. The app handles whole numbers; very large values may exceed the supported range. Always double-check important calculations yourself.

Light and dark themes, a tiny download, and no clutter. Download Factor Calculator and explore the building blocks of every number.