System initial mass function of the 25 Ori group from planetary-mass objects to intermediate/high-mass stars

GS acknowledges support from a CONACYT/UNAM fellowship and from the Posgrado en Astrof isica graduate program at Instituto de Astronomia, UNAM. GS, CRZ and JJD acknowledge support from programs UNAM-DGAPA-PAPIIT IN116315 and IN108117, Mexico. JJD acknowledges support from Secretaria de Relaciones Exteriores del Gobierno de Mexico and Programa de Movilidad e Intercambios Academicos de la Comision Sectorial de Investigacion Cientifica, Universidad de la Republica, Uruguay. MC acknowledges financial support from the Spanish Ministry of Economy and Competitiveness (MINECO) under the grantsAYA2015-68012-C201, AYA2014-58861-C3-1-P and AYA2017-88007-C3-1-P.