Answer
1638 is not perfect because:
1 + 2 + 3 + 6 + 7 + 9 + 13 + 14 + 18 + 21 + 26 + 39 + 42 + 63 + 78 + 91 + 117 + 126 + 182 + 234 + 273 + 546 + 819 ≠ 1638
Related links:
- All calculations
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- What is the prime factorization of 1638?