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Perfect Number
Is 640 a perfect number?
Is 640 a perfect number? [SOLVED]
Answer
640 is not perfect because:
1 + 2 + 4 + 5 + 8 + 10 + 16 + 20 + 32 + 40 + 64 + 80 + 128 + 160 + 320
≠
640
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Is 640 a composite number?
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What is the prime factorization of 640?
640 is not perfect because:
640 is not perfect because:
