def factor(number): factors = list([]) for i in listprimes(sqrt(number)+1): #print(number) if (number % i == 0): factors.append(i) factors.extend(factor(number/i)) return factors if number != 1: factors.append(number) return factors
#! /usr/bin/python2 import listprime total = 2 for i in listprime.listprimes(2000000): total += i print total