8575
This number is a composite.
The smallest odd composite number n which satisfy the equation sigma(n+2)=sigma(n)+2 , where sigma(n) is sum of divisors of n. [Gupta]
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This number is a composite.
The smallest odd composite number n which satisfy the equation sigma(n+2)=sigma(n)+2 , where sigma(n) is sum of divisors of n. [Gupta]