Answer
1428 is not perfect because:
1 + 2 + 3 + 4 + 6 + 7 + 12 + 14 + 17 + 21 + 28 + 34 + 42 + 51 + 68 + 84 + 102 + 119 + 204 + 238 + 357 + 476 + 714 ≠ 1428
Related links:
- All calculations
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