5.5

分解质因数

n=int(input("请输入需要分解的数字："))
print("{} =".format(n),end=' ')
while n>1:
    for i in range(2,n+1):
        if n%i==0:
            n=int(n/i)
            if n==1:
                print(i)
            else:
                print("{} *".format(i),end=' ')
            break

 or

x=eval(input())
k=2
print(x,"=",end="")
while x>1:
    if x%k==0:     
        print(k,end="")
        x=x//k  
        if x>1:
            print("*",end="")
    else:
        k=k+1