题解 | #质数因子#

a = int(input())
num =2
//利用质数的特性减小范围
while( num <= a**0.5):

    if a % num == 0:
        print(num,end = ' ')
        a = a/num
    else:
        num +=1 
	//做一个do while
    if num > int(a**0.5):
        print(int(a),end = ' ')