Python Practice Example 19
Python 100 ExamplesProblem:If a number is exactly equal to the sum of its factors, this number is called a "perfect number". For example, 6=1+2+3. Program to find all perfect numbers within 1000.
Program analysis:Please refer to the programPython Practice Example 14。
Program source code:
Example
#!/usr/bin/python
# -*- coding: UTF-8 -*-
from sys import stdout
for j in range(2,1001):
k = []
n = -1
s = j
for i in range(1,j):
if j % i == 0:
n += 1
s -= i
k.append(i)
if s == 0:
print (j)
for i in range(n):
stdout.write(str(k[i]))
stdout.write(' ')
print (k[n])
The output result of the above example is:
6 1 2 3 28 1 2 4 7 14 496 1 2 4 8 16 31 62 124 248Other extensions