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BALTIC-WAY 2010 Problem 16

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For a positive integer kk, let d(k)d(k) denote the number of divisors of kk (e.g. d(12)=6d(12)=6 ) and let s(k)s(k) denote the digit sum of kk (e.g. s(12)=3s(12)=3 ). A positive integer nn is said to be amusing if there exists a positive integer kk such that d(k)=s(k)=nd(k)=s(k)=n. What is the smallest amusing odd integer greater than 1 ?

Dataset text NuminaMath olympiads. Quoted with source.

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