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130 (another Prime Pages' Curiosity) |
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130 = 51 + 53. Note the product of the concatenated powers (13) and sum of bases (10). [Gevisier] Sum of the factorials of the first five terms of the Fibonacci sequence. [Lutz] 130 is the only number equal to the sum of the squares of its first 4 divisors: 130 = 1^2 + 2^2 + 5^2 + 10^2. [Ingala]
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