A nonsimple criterion for finite factorized groups

In the study of factorizable groups the authors consider some natural restrictions on the factors. Ito Theorem about two-step solubility of a finite group which is factorized by abelian subgroups, and Kegel-Wielandt Theorem about solubility of a finite group which is a product of two nilpotent subgroups are the classical examples in this trend. We should also note that L.S. Kazarin have obtained validity of the hypothesis of S.A. Chunikhin about non-simplicity of a finite group which is factorized by subgroups with nontrivial center.