Argentina is about 1.9 times bigger than Alaska.

Alaska is approximately 1,481,348 sq km, while Argentina is approximately 2,780,400 sq km, making Argentina 88% larger than Alaska. Meanwhile, the population of Alaska is ~710,231 people (45.5 million more people live in Argentina).
Tip: This to-scale comparison of Alaska vs. Argentina uses the Mercator projection, which distorts the size of regions near the poles.