Q38 / 59 · NEST (NISER) 2019 (Session 1) · Mathematics

A positive integer $k$ is perfect if the sum of its positive divisors equals $2 k$. If $n$ is a perfect number, then the sum of the reciprocal of its positive divisors

A
varies with $n$
Correct answer
B
is 2
C
is 1
D
is greater than $n / 2$

Hence, the correct answer is option: 'B'.

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