The page numbers of a book are consecutive natural numbers 1, 2, 3, 4, ... 9, 10... When adding these page numbers, someone adds one of the page numbers by mistake twice, and the result is 2001, then the book has a total of How many pages.
某书的页码是连续的自然数1，2，3，4，…9，10…当将这些页码相加时，某人把其中一个页码错加了两次，结果和为2001，则这书共有多少页．
<result>62</result>