FactorInteger

FactorInteger[n] gives a list of the prime factors of the integer n, together with their exponents.

FactorInteger[n, k] does partial factorization, pulling out at most k distinct factors.

Examples

Factor an integer into primes:

FactorInteger[120]
(* {{2, 3}, {3, 1}, {5, 1}} *)

This means 120 = 2³ × 3¹ × 5¹.

Factor a larger number:

FactorInteger[1000]
(* {{2, 3}, {5, 3}} *)

Please visit the official Wolfram Language Reference for more details.