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It All Adds Up
The first number to have its factors add up to be more than itself is 12 (6, 4, 3, 2, 1). This does not include the number itself. Quickly now, what are the next three numbers for which this can be said?
Answer
18 (9, 6, 3, 2, 1)20 (10, 5, 4, 2, 1)
24 (12, 8, 6, 4, 3, 2, 1)
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