Python| sympy.primenu() 方法

借助sympy.primenu()方法，我们可以计算给定正整数的不同素因子的数量。

Syntax: primenu(n)

Parameter:
n – It denotes an integer.

Returns: Returns the number of distinct prime factors for the given positive integer.

示例 #1：

# import primenu() method from sympy
from sympy.ntheory.factor_ import primenu
  
n = 24
  
# Use primenu() method 
primenu_n = primenu(n) 
      
print("Number of distinct prime factors of {} = {} ".format(n, primenu_n)) # 2 and 3

输出：

Number of distinct prime factors of 24 = 2  

示例 #2：

# import primenu() method from sympy
from sympy.ntheory.factor_ import primenu
  
n = 2 * 3*7 * 11 * 13
  
# Use primenu() method 
primenu_n = primenu(n) 
      
print("Number of distinct prime factors of {} = {} ".format(n, primenu_n))  

输出：

Number of distinct prime factors of 6006 = 5