28 lines
421 B
C
28 lines
421 B
C
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#define MAX 10000
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#include <stdio.h>
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#include <math.h>
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int d( int input) {
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int sum = 0;
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int n;
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for(n=1;n<input;n++) {
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if(input % n == 0)
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sum += n;
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}
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return sum;
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}
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int main( )
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{
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int result = 0;
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int number;
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int d_sum;
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for(number = 1; number < MAX; number++) {
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d_sum = d(number);
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if(number != d_sum && number == d(d_sum)) {
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result += number;
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}
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}
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printf("%d", result);
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}
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