If t(n) = Number of positive divisors of n, n ∈ N, then what is the value of $t(28)$?
Answer & explanation
Correct answer: option 2
The correct answer is option (2) : 6
$28= 1×28$
$28=2×14$
$28=4×7$
So, +ve divisions of $28=1,2, 4, 7, 14,28$
$∴t(28)= 6$