1. A management device comprising: an acquiring component that acquires correlation information that correlates with a degree of deterioration of a radiation detection component from plurality of imaging devices, each of the plurality of imaging devices comprising a radiation detection component that detects radiation that has passed through respective investigation subjects, and each of the plurality of imaging devices performing image capture by generating image data representing a radiographic image according to the amount of radiation detected by the radiation detection component, and storing the image data in a predetermined storage region; and a numericalization component that numericalizes the degree of deterioration of each of the respective radiation detection components of the plurality of imaging devices based on the correlation information acquired by the acquiring component.