Solution: The number of hours in a week is $7 \times 24 = 168$. The prime factorization of $168$ is $2^3 \times 3 \times 7$. The odd divisors are the divisors of $3 \times 7 = 21$, which are $1, 3, 7, 21$. Their sum is $1 + 3 + 7 + 21 = 32$. - Nelissen Grade advocaten