Nauru is about 13,503 times smaller than Ecuador.

Ecuador is approximately 283,561 sq km, while Nauru is approximately 21 sq km, making Nauru 0.01% the size of Ecuador. Meanwhile, the population of Ecuador is ~17.3 million people (17.3 million fewer people live in Nauru).
Tip: This to-scale comparison of Ecuador vs. Nauru uses the Mercator projection, which distorts the size of regions near the poles.