23. Jiji and Taotao take turns to take stones from the table, the total number of stones is more than 1 and less than 100. Each person takes a number of stones that is a factor of the number of stones on the table, but cannot take all of them. When a person cannot take any stones, the other wins. Jiji takes the stones first, both adopt the best strategy, if Taotao has a sure-win strategy, then there are $\qquad$ possible situations for the total number of stones.
$49$