Alaska is about 107 times bigger than Montenegro.

Montenegro is approximately 13,812 sq km, while Alaska is approximately 1,481,348 sq km, making Alaska 10,625% larger than Montenegro. Meanwhile, the population of Montenegro is ~604,966 people (105,265 more people live in Alaska).
Tip: This to-scale comparison of Montenegro vs. Alaska uses the Mercator projection, which distorts the size of regions near the poles.