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Is 2160 a perfect number? [SOLVED]

Answer

2160 is not perfect because:

1 + 2 + 3 + 4 + 5 + 6 + 8 + 9 + 10 + 12 + 15 + 16 + 18 + 20 + 24 + 27 + 30 + 36 + 40 + 45 + 48 + 54 + 60 + 72 + 80 + 90 + 108 + 120 + 135 + 144 + 180 + 216 + 240 + 270 + 360 + 432 + 540 + 720 + 1080 ≠ 2160
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