North America is 17 times larger than Alaska (USA).
Area: 1,477,953 km2 US Census
Population: 735,132 (July 2013) US Census
Alaska is a U.S. state situated in the northwest extremity of the North American continent. Wikipedia
Area: 24,490,000 km2 DESA
Population: 542,056,000 (2012) DESA
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It can also be considered a northern subcontinent of the Americas. Wikipedia