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DivisorSigma

Usage

•DivisorSigma[k, n]给出函数除数函数 .


Notes

•整型数学函数(参见 A.3.10节.)
• 是 的因子的 次幂的和.
•DivisorSigma[k, n, GaussianIntegers -> True] 将是 Gaussian整数的因子包含在内.
• 参见Mathematica 全书:3.2.4节.
• 同时参见: EulerPhi.
Further Examples

Here are two ways to find the sum of the divisors of .

In[1]:=  

Out[1]=

In[2]:=  

Out[2]=



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