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Is 4020 a perfect number? [SOLVED]

Answer


4020 is not perfect because:

1 + 2 + 3 + 4 + 5 + 6 + 10 + 12 + 15 + 20 + 30 + 60 + 67 + 134 + 201 + 268 + 335 + 402 + 670 + 804 + 1005 + 1340 + 2010 4020
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