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 sympyfrom sympy import primefactorsn = 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 sympyfrom sympy import primefactorsn = -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]