Prime Factorization Calculator
Break any whole number into its prime factors and check if it's prime.
How to use the Prime Factorization Calculator
Enter a whole number to get its prime factorization in exponent form, the number of divisors and whether it is prime.
Formula
n = p₁^a₁ × p₂^a₂ × … × pₖ^aₖ divisors = (a₁+1)(a₂+1)…(aₖ+1)
Worked example
55,993 = 7 × 19 × 421, so it has 8 divisors.
Open 55,993 in the Number Explorer →
Frequently asked questions
Is 1 a prime number?
No. A prime has exactly two distinct divisors — 1 and itself — and 1 has only one.
Results are estimates for educational and planning purposes. Always confirm important financial, health or legal decisions with a qualified professional. Last reviewed 2026-09-27.