//Euler 函数前n项和 /* phi(n) 为n的Euler原函数 if( (n/p) ％ i == 0 ) phi(n)=phi(n/p)*i else phi(n)=phi(n/p)*(i-1) 对于约数：divnum 如果i|pr[j] 那么 divnum[i*pr[j]]=divsum[i]/(e[i]+1)*(e[i]+2) //最小素因子次数加1 否则 divnum[i*pr[j]]=divnum[i]*divnum[pr[j]] //满足

1 R Finding particular sequences of prime numbers Write a program that finds all sequences of consecutive prime 5-digit numbers, say (a, b, c, d, e, f ), such that b = a + 2, c = b + 4, d = c + 6, e = d + 8, and f = e + 10.-1 R Finding particular

自己编写的简单素数(质数)判断函数，文件已带使用说明//编 写 人：Chernic//学 校：广州大学//联系邮箱：iamchernic@gmail.com-I have written a simple primes (prime) to determine the function// Write the person: Chernic// School: Guangzhou University// Contact E-mail: iamchernic@gmail.com