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  1. #include <stdio.h>
  2.  
  3. int main() {
  4.     int i, j, k, a, b;
  5.  
  6.     for (a = 3; a <= 1500; a++) {
  7.         for (i = 1, j = 0; i < a; i++) {
  8.             if (a % i == 0) {
  9.                 j += i;
  10.             }
  11.         }
  12.  
  13.         for (b = 2; b < a; b++) {
  14.             for (i = 1, k = 0; i < b; i++) {
  15.                 if (b % i == 0) {
  16.                     k += i;
  17.                 }
  18.             }
  19.             if (j == b && k == a) {
  20.                 printf("%d: 1", a);
  21.                 for (i = 2; i < a; i++) {
  22.                     if (a % i == 0) {
  23.                         printf("+%d", i);
  24.                     }
  25.                 }
  26.                 printf(" = %d\n", j);
  27.  
  28.                 printf("%d: 1", b);
  29.                 for (i = 2; i < b; i++) {
  30.                     if (b % i == 0) {
  31.                         printf("+%d", i);
  32.                     }
  33.                 }
  34.                 printf(" = %d\n\n", k);
  35.             }
  36.         }
  37.     }
  38.  
  39.     return 0;
  40. }
  41.  
Success #stdin #stdout 1.52s 5276KB
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stdin
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Standard input is empty
stdout
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284: 1+2+4+71+142 = 220
220: 1+2+4+5+10+11+20+22+44+55+110 = 284

1210: 1+2+5+10+11+22+55+110+121+242+605 = 1184
1184: 1+2+4+8+16+32+37+74+148+296+592 = 1210
https://ideone.com/QAKSbk
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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