130

This number is a composite.

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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]

Submitted: 2004-08-26 00:40:26; Last Modified: 2008-01-30 17:28:00.