  We employ monomer-resolved computer simulations of model dendrimer molecules,
to examine the significance of many-body effects in concentrated solutions of
the same. In particular, we measure the radial distribution functions and the
scattering functions between the centres of mass of the dissolved dendrimers at
various concentrations, reaching values that slightly exceed the overlap
density of the macromolecules. We analyse the role played by many-body
effective interactions by comparing the structural data to those obtained by
applying exclusively the previously obtained two-body effective interactions
between the dendrimers [G{\"o}tze I O, Harreis H M and Likos C N 2004 {\it J.
Chem. Phys.} {\bf 120} 7761]. We find that the effects of the many-body forces
are small in general and they become weaker as the dendrimer flexibility
increases. Moreover, we test the validity of the oft-used factorisation
approximation to the total scattering intensity into a product of the form- and
the scattering factors, finding a breakdown of this factorisation at high
concentrations.

Soft Condensed Matter