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Is 3900 a perfect number? [SOLVED]

Answer

3900 is not perfect because:

1 + 2 + 3 + 4 + 5 + 6 + 10 + 12 + 13 + 15 + 20 + 25 + 26 + 30 + 39 + 50 + 52 + 60 + 65 + 75 + 78 + 100 + 130 + 150 + 156 + 195 + 260 + 300 + 325 + 390 + 650 + 780 + 975 + 1300 + 1950 ≠ 3900
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