Inverting OpAmp with voltage divider in feedback loop
No, the shown circuit is not a bandpass. It is a first-order highpass (inverting). Here is the transfer function (R2 and C2 are the feedback elements)

$$H(s) = -\frac{R_1C_2s}{1 + s(R_1C_1 + R_2C_2 + R_1C_2)}$$

In the given formula, the three resistors in the feedback path are replaced by R2. This resistor value can be simply found applying the star-to-triangle transformation. 

As the result of this transformation you get three new resistors, however two of them  play no role: One resistor appears as a load to the ground at the opamp output and the second one appears between the inverting opamp input and ground. Assuming an ideal opamp, both resistors have no influence on the gain.