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Is 3978 a perfect number? [SOLVED]

Answer


3978 is not perfect because:

1 + 2 + 3 + 6 + 9 + 13 + 17 + 18 + 26 + 34 + 39 + 51 + 78 + 102 + 117 + 153 + 221 + 234 + 306 + 442 + 663 + 1326 + 1989 3978
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