The eigenfactor is offered by ISI Web of Knowledge as an alternative journal score compared to the impact factor. It is explained on their site as follows:
The Eigenfactor Score calculation is based on the number of times articles from the journal published in the past five years have been cited in the JCR year, but it also considers which journals have contributed these citations so that highly cited journals will influence the network more than lesser cited journals. References from one article in a journal to another article from the same journal are removed, so that Eigenfactor Scores are not influenced by journal self-citation.
From this explanation, I am not sure whether the eigenfactor depends on the total number of articles that a journal publishes?