会英语和数学的来I'm the product of four prime numbers.My three digits are all prime and different.The sum of my prime factors is 30.Who am 急

会英语和数学的来I'm the product of four prime numbers.My three digits are all prime and different.The sum of my prime factors is 30.Who am 急
会英语和数学的来
I'm the product of four prime numbers.My three digits are all prime and different.The sum of my prime factors is 30.Who am 急

会英语和数学的来I'm the product of four prime numbers.My three digits are all prime and different.The sum of my prime factors is 30.Who am 急
题目大意是它是四个素数的积.组成它的三个数字都是素数且不一样.它的素因子和是30.答案是532.它的因子是2、2、7、19.相加正好为30.其实这道题主要在于2、3、5、7四个数的排列成三位数.注意的是,1不是素数

设四个质数是a,b,c,d abcd = me = 三位数 a+b+c+d 的公约数是30 考虑2，3，5，7，11，13，17…… 是532，这四个是：2，2，7，19