at least one processor configured to control

a power supply control unit configured to control power supply to the plurality of functional devices including the printer device and the scanner device, the power supply control unit being configured to control a first power supply state in which the printer device is in a power-supply-stopped state and the scanner device is in a power-supplying state and a second power supply state in which both of the printer device and the scanner device are in the power-supply-stopped state, a third power supply state in which both of the printer device and the scanner device are in the power-supplying state, and a fourth power supply state in which the scanner device is in the power-supply-stopped state and the printer device is in the power-supplying state,

wherein, when the printer device and the scanner device are in the power-supply-stopped state, communication with the at least one processor is not possible,

wherein the at least one processor is configured to

determine whether communication with each of the plurality of functional devices is possible,

manage flag information indicating whether communication is possible for each of the plurality of functional devices,

determine, based on the flag information, whether communication with at least one of the printer device and the scanner device among the plurality of functional devices is possible to determine which functional devices to transmit a counter information request to,

transmit the counter information acquisition request to the printer device and the scanner device when the third power supply state is to shift to the second power supply state,

transmit the counter information acquisition request to the scanner device but not to the printer device when the first power supply state is to shift to the second power supply state,

transmit the counter information acquisition request to the printer device but not to the scanner device when the fourth power supply state is to shift to the second power supply state,

save acquired counter information in RAM; and

update, based on a power state of the image processing apparatus being shift to, the flag information corresponding to a power supply state into which the power state of the image processing apparatus is shifted to;

wherein the counter information request is a request for a number of times physical parts are used in a functional device.