Argentina is 2.7 times larger than Mauritania.
Area: 2,780,400 km2 World Factbook
Population: 43,024,374 (July 2014) World Factbook
Argentina, officially the Argentine Republic is a federal republic located in southeastern South America. Wikipedia
Area: 1,030,700 km2 World Factbook
Population: 3,516,806 (July 2014) World Factbook
Mauritania, officially the Islamic Republic of Mauritania, is a country in the Maghreb region of western North Africa. Wikipedia