If, on the other hand, you want the value of the totient for some large number for which you have the factorization, pass the argument as sequence of (prime, exponent) pairs.
另一方面,如果你想要一个大的您要进行因式分解的数字,将参数作为(素数,指数)对的序列传递。
This paper lists some important and interesting properties of the Euter totient functions, which have the potential use in the design and analysis of cryptosystems.