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Is 28000 a perfect number? [SOLVED]

Answer

28000 is not perfect because:

1 + 2 + 4 + 5 + 7 + 8 + 10 + 14 + 16 + 20 + 25 + 28 + 32 + 35 + 40 + 50 + 56 + 70 + 80 + 100 + 112 + 125 + 140 + 160 + 175 + 200 + 224 + 250 + 280 + 350 + 400 + 500 + 560 + 700 + 800 + 875 + 1000 + 1120 + 1400 + 1750 + 2000 + 2800 + 3500 + 4000 + 5600 + 7000 + 14000 ≠ 28000
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