Python求算數平方根和約數

一、求算術平方根

a=0
x=int(raw_input('Enter a number:'))
if x >= 0:
    while a*a < x:
        a = a + 1   
    if a*a != x:
        print x,'is not a perfect square'
    else:
        print a
else:
    print x,'is a negative number'

 二、求約數

方法一：

divisor = [ ]
x=int(raw_input('Enter a number:'))
i=1                                     
while i<=x:         
    if x%i ==0:
        divisor.append(i)
    i = i +1
print 'divisor:',divisor

方法二：

divisor = [ ]
x=int(raw_input('Enter a number:'))
for i in range(1,x+1):
    if x%i ==0:
        divisor.append(i)      # 此行也可以換成 divisor = divisor + [i]
print 'divisor:',divisor