Pitcairn Islands is about 31,518 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Pitcairn Islands is approximately 47 sq km, making Pitcairn Islands 0.0% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (710,181 fewer people live in Pitcairn Islands).
Tip: This to-scale comparison of Alaska vs. Pitcairn Islands uses the Mercator projection, which distorts the size of regions near the poles.