Math

Factor Calculator

List every positive divisor of an integer plus divisor count, sum, and perfect-number check.

Inputs

Integer (1 to 10,000,000)

Result

Divisors of 60

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

How it's calculated

d is a divisor of n iff n mod d = 0. Iterate to √n and pair (d, n/d).

What's a perfect number?

A number equal to the sum of its proper divisors — 6, 28, 496, 8128 are the first four.

Why cap at 10⁷?

Beyond that the divisor list becomes unwieldy and the search slows in the browser.

Math

Prime Factorization Calculator

Factor any integer up to 10¹² into its prime components with exponents.

Math

Greatest Common Factor Calculator

Find the GCF and LCM of any list of integers, plus a simplified ratio for the first two.

Math

GCD & LCM Calculator

Greatest common divisor and least common multiple of two integers.

Math

Percentage Calculator

What is X% of Y, X is what % of Y, and percentage change — all in one place.