MathDB

1

Part of 2008 Paraguay Mathematical Olympiad

Problems(1)

Amount of numbers that have exclusively these prime factors

Source: Paraguayan National Olympiad 2008, Level 3, Problem 1

8/31/2014
How many positive integers n<500n < 500 exist such that its prime factors are exclusively 22, 77, 1111, or a combination of these?
number theoryprime factorizationnumber theory proposed