factor

Prime factors

Syntax

f = factor(n)

Description

f = factor(n) returns a row vector containing the prime factors of n. Vector f is of the same data type as n.

Examples

Prime Factors of Double Integer Value

f = factor(200)

f = 1×5

     2     2     2     5     5

Multiply the elements of f to reproduce the input value.

prod(f)

ans = 
200

Prime Factors of Unsigned Integer Value

n = uint16(138);
f = factor(n)

f = 1×3 uint16 row vector

    2    3   23

Multiply the elements of f to reproduce n.

prod(f)

ans = 
138

Input Arguments

n — Input value

real, nonnegative integer scalar

Input value, specified as a real, nonnegative integer scalar.

Example: 10

Example: int16(64)

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Extended Capabilities

C/C++ Code Generation

Generate C and C++ code using MATLAB® Coder™.

Usage notes and limitations:

• The maximum double precision input is 2^33.

• The maximum single precision input is 2^25.

• The input n cannot have type int64 or uint64.

Thread-Based Environment

Run code in the background using MATLAB® backgroundPool or accelerate code with Parallel Computing Toolbox™ ThreadPool.

This function fully supports thread-based environments. For more information, see Run MATLAB Functions in Thread-Based Environment.

Version History

Introduced before R2006a