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If $σ(n)$ = Sum of all positive divisors of n, n ∈ N, then what is the value of $σ(36)$ ? |
89 87 94 91 |
91 |
The correct answer is option (4) : 91 $σ(36)$ +ve divisions of 36 are $1, 2, 3, 4, 6, 9, 12, 18, 36$ $∴σ(36)=1+2+3+4+6+9+12+18+36$ $=91$ |
