Answer
1120 is not perfect because:
1 + 2 + 4 + 5 + 7 + 8 + 10 + 14 + 16 + 20 + 28 + 32 + 35 + 40 + 56 + 70 + 80 + 112 + 140 + 160 + 224 + 280 + 560 ≠ 1120
Related links:
- All calculations
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