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Is 4180 a perfect number? [SOLVED]

Answer


4180 is not perfect because:

1 + 2 + 4 + 5 + 10 + 11 + 19 + 20 + 22 + 38 + 44 + 55 + 76 + 95 + 110 + 190 + 209 + 220 + 380 + 418 + 836 + 1045 + 2090 4180
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