Let d(n) denote the number of positive divisors of a positive integer n. Which of the following are correct ?
1. d(5) = d(11)
2. d(5)·d(11) = d(55)
3. d(5) + d(11) = d(16)
Select the correct answer using the code given below :
Mathematics
2020
CDS Elementary Mathematics 2020
CDS 2020
Options
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