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Is 3120 a perfect number? [SOLVED]

Answer

3120 is not perfect because:

1 + 2 + 3 + 4 + 5 + 6 + 8 + 10 + 12 + 13 + 15 + 16 + 20 + 24 + 26 + 30 + 39 + 40 + 48 + 52 + 60 + 65 + 78 + 80 + 104 + 120 + 130 + 156 + 195 + 208 + 240 + 260 + 312 + 390 + 520 + 624 + 780 + 1040 + 1560 ≠ 3120
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