a是13的因数，那么a等于3R1c1p)H+?,f'\)n)[-H4X7}9k3^(`8m+t2e7J,Y4A0S*v7y3R8n:|8G0R
A．1-H4X7}9k3^(`8m+t2e7J,Y4A0S*v7y3R8n:|8G0R
B．13-H4X7}9k3^(`8m+t2e7J,Y4A0S*v7y3R8n:|8G0R
C．1或13-H4X7}9k3^(`8m+t2e7J,Y4A0S*v7y3R8n:|8G0R
D．26-H4X7}9k3^(`8m+t2e7J,Y4A0S*v7y3R8n:|8G0R