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A positive integer n is a perfect number provided that the sum of all the positive factors of n, including 1 and n, is equal to 2n. What is the sum of the reciprocals of all the positive factors of the perfect number 28?
A. 1/4
B. 56/27
C. 2
D. 3
E. 4
The OA is C
A positive integer n is a perfect number provided that the sum of all the positive factors of n, including 1 and n, is equal to 2n. What is the sum of the reciprocals of all the positive factors of the perfect number 28?
A. 1/4
B. 56/27
C. 2
D. 3
E. 4
The OA is C
