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Is 1040 a perfect number? [SOLVED]

Answer


1040 is not perfect because:

1 + 2 + 4 + 5 + 8 + 10 + 13 + 16 + 20 + 26 + 40 + 52 + 65 + 80 + 104 + 130 + 208 + 260 + 520 1040
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