MathDB
Divisors of divisor

Source: St Petersburg Olympiad 2012, Grade 10, P5

September 29, 2017
number theory

Problem Statement

SS is natural, and S=d1>d2>...>d1000000=1S=d_{1}>d_2>...>d_{1000000}=1 are all divisors of SS. What minimal number of divisors can have d250d_{250}?