Python | sympy.primefactors() method

Last Updated : 30 Jan, 2023

With the help of sympy.primefactors() method, we can find the prime factors of a given number. Unlike factorint(), primefactors() does not return -1 or 0.

Syntax: primefactors(n) Parameter: n - It denotes an integer. Returns: Returns a list of prime factors of the given integer.

Example #1:

Python3

# import primefactors() method from sympy
from sympy import primefactors

n = 2772    # (2 * 2 * 3 * 3 * 7 * 11)

# Use primefactors() method 
primefactors_n = primefactors(n) 

print("The prime factors of {} : {}".format(n, primefactors_n))

Output:

The prime factors of 2772 : [2, 3, 7, 11]

Example #2:

Python3

# import primefactors() method from sympy
from sympy import primefactors

n = -210 # -(2 * 3 * 5 * 7)

# Use primefactors() method 
primefactors_n = primefactors(n) 
    
print("The prime factors of {} : {}".format(n, primefactors_n))

Output:

The prime factors of -210 : [2, 3, 5, 7]

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Python | sympy.primefactors() method

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