404 – Not Found

Hello,

I am using a seo software external to wordpress, and when I crawled my website, it found 3 pages with 404 error. It gave me the id’s of the pages and when I looked into wordpress database, under the wp_posts category I saw that they were not there. It’s possible for those pages to be somewhere else in database? Or it could be from the my drop-menu where I have 3 pages with the url: # as did not have any content for them?

Thank you