An Archimedes spiral displaying 100000 numbers [Une spirale d'Archimède montrant 100000 nombres entiers].
rho = srqt(N) teta = 2.pi.sqrt(N)The radius of the N-th sphere is proportional to an ascending function of the number of divisors of N. The number 0 is at the center and is not displayed. The number 1 and the prime numbers are visualized by means of white spheres (a smaller one for the number 1).