Singapore is about 2,060 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Singapore is approximately 719 sq km, making Singapore 0.05% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (5.2 million more people live in Singapore).
Tip: This to-scale comparison of Alaska vs. Singapore uses the Mercator projection, which distorts the size of regions near the poles.