源代码如下：

# coding=utf-8
def divisor(a,b):
    if a==b:
        return a
    else:
        for i  in range(max(a,b)/2+1):
            if a%i==0 and b%i==0:
                return int(i)
def multiple(a,b):
    c=divisor(a,b)
    return a*b/c
news=[]
s=input("请输入你的两个数字，用逗号隔开：")
for i in s.split(","):
    news.append(int(i))
mdivisor=divisor(news[0],news[1])
multiple=multiple(news[0],news[1])
print("最大公约数为：%d,最小公约数为：%d" % (mdivisor,multiple))

运行结果是：
Traceback (most recent call last):
  File "C:/Users/PycharmProjects/untitled/线性方程/练习3.py", line 18, in <module>
    mdivisor=divisor(news[0],news[1])
  File "C:/Users/PycharmProjects/untitled/线性方程/练习3.py", line 8, in divisor
    for i  in range(max(a,b)/2+1):
TypeError: 'float' object cannot be interpreted as an integer