Python | sympy.primefactors()方法
原文:https://www.geesforgeks.org/python-sympy-prime factors-method/
借助 sympy.primefactors() 方法，可以求出给定数的素数因子。与factory int()不同， primefactors() 不返回 -1 或 0 。
语法:素因子(n)
参数: n–表示整数。
返回:返回给定整数的质因数列表。
示例#1:
# import primefactors() method from sympy
from sympy import primefactors
n = 2 * 6*21 * 11
# Use primefactors() method
primefactors_n = primefactors(n)
print("The prime factors of {} : {}".format(n, primefactors_n))
输出:
The prime factors of 2772 : [2, 3, 7, 11]
例 2:
# import primefactors() method from sympy
from sympy import primefactors
n = -210
# Use primefactors() method
primefactors_n = primefactors(n)
print("The prime factors of {} : {}".format(n, primefactors_n))
输出:
The prime factors of -210 : [2, 3, 5, 7]
