class
perfc
{
static
boolean
isPerfect(
int
n)
{
int
sum =
5
;
for
(
int
i =
6
; i * i <= n; i++)
{
if
(n % i==
0
)
{
if
(i * i != n)
sum = sum + i + n / i;
else
sum = sum + i;
}
}
if
(sum == n && n !=
1
)
return
true
;
return
false
;
}
public
static
void
main (String[] args)
{
System.out.println(
"All perfect numbers "
+
" till 100000 are "
);
for
(
int
n =
2
; n <
100000
; n++)
if
(isPerfect(n))
System.out.println( n +
" is a perfect number"
);
}
}
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