Papua New Guinea is 22,040 times larger than Nauru.
Area: 21 km2 World Factbook
Population: 9,488 (July 2014) World Factbook
Nauru, officially the Republic of Nauru and formerly known as Pleasant Island, is an island country in Micronesia in the South Pacific. Its nearest neighbour is Banaba Island in Kiribati, 300 kilometres to the east. Wikipedia
Area: 462,840 km2 World Factbook
Population: 6,552,730 (July 2014) World Factbook
Papua New Guinea, officially the Independent State of Papua New Guinea, is an Oceanian country that occupies the eastern half of the island of New Guinea and its offshore islands in Melanesia, a region of the southwestern Pacific Ocean north of Australia. Wikipedia