Answer
816 is not perfect because:
1 + 2 + 3 + 4 + 6 + 8 + 12 + 16 + 17 + 24 + 34 + 48 + 51 + 68 + 102 + 136 + 204 + 272 + 408 ≠ 816
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Answer
816 is not perfect because:
1 + 2 + 3 + 4 + 6 + 8 + 12 + 16 + 17 + 24 + 34 + 48 + 51 + 68 + 102 + 136 + 204 + 272 + 408 ≠ 816