An "Iskander-M" operational-tactical missile system brigade includes 51 units of equipment, and its launchers and transporter-loader vehicles can accommodate up to 48 missiles. This data is provided by Military Watch Magazine in an article about the capabilities of the Russian missile system.
The core of the brigade consists of 12 transporter-erector-launchers and the same number of transporter-loader vehicles. Each launcher is designed for two missiles, with two more missiles carried by the reloading vehicles. As a result, a full set of 12 launchers and 12 transporter-loader vehicles allows for the placement of up to 48 missiles.
The remaining 27 vehicles provide command, preparation, and maintenance of the complex. Open descriptions of the brigade set also indicate 11 command and staff vehicles and 14 life support vehicles.
The "Iskander-M" itself is not a separate launch vehicle, but an entire system with an extensive infrastructure. It includes means of control, transportation, and reloading of missiles, support equipment, and mobile points for crew operations.
Such an organization allows the missile brigade to operate as a single mobile complex, where launchers, reloading vehicles, and auxiliary equipment work within a common control system.