We find a univariate quartic equation , and the coefficients of the equation are composed of the Schwinger term and the neutron spin g factor. The solution of the equation is two real roots and two conjugate imaginary roots. These roots are not arbitrary numbers, but are related to the anomalous magnetic moments of the three- generation of charged lepton. One of the two real roots is the anomalous magnetic moment of the electron, and the other is about one tenth of the anomalous magnetic moment of the τ lepton; the real number of the imaginary part of the two conjugate imaginary roots is about 10 times the anomalous magnetic moment of the muon. For this strange proportional relation, we have discussed it and found out the exact relation that they may exist. Finally, we believe that the anomalous magnetic moments of the three-generation of charged lepton is derived from the same high-order algebraic equation, indicating that algebra can also study quantum physics, and also suggesting that there may be algebraic relations and potential deep physical laws.