Python求算数平方根和约数

一、求算术平方根

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、求约数

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)      # 此行也可以换成 divisor = divisor + [i]
print 'divisor:',divisor