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  1. 10-25-2013, 08:00 PM #1
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    Dirk Broer
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    1 000 000 000 285 924 610

    NeoGen found a weird number!

    Actually he has already found 431 of them, but the one above is a special as it is on 'Weird numbers - The best three results'.

    The smallest weird number is 70. Its proper divisors are 1, 2, 5, 7, 10, 14, and 35; these sum to 74, but no subset of these sums to 70. The number 12, for example, is abundant but not weird, because the proper divisors of 12 are 1, 2, 3, 4, and 6, which sum to 16; but 2+4+6 = 12.
    The first few weird numbers are: 70, 836, 4030, 5830, 7192, 7912, 9272, 10430
    Last edited by Dirk Broer; 10-25-2013 at 08:17 PM.

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