A person bought a safe which can be unlocked by entering a 2-digit

secret code. After some time, he forgot the secret code of his safe.

However, he remembers some numbers that could be the secret code.

The secret code is one among the following numbers.

5 17 29 22 11 26 27 35 39 41

Let us give him some clues to find the secret code of his safe.

It is greater than 20

It is not a prime number

It is smaller than 40

It has 13 as one of its factors

It is an odd number.

It has only 4 factors

The secret code is ____________________

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