two

I think 4: John Quincy Adams Rutherford B. Hays Benjamin Harrison George W. Bush (2000)

"In 1800, when neither Thomas Jefferson nor Aaron Burr received a majority of votes cast by the Electoral College, the U.S. House of Representatives, as the Constitution demanded, elected Jefferson by one vote, ending the impasse. Both Jefferson and Burr were running on the Democratic-Republican ticket, defeating soundly their Federalist opponents. To prevent this unexpected political situation – namely, candidates in the same parties running for both President and Vice President against each other in the same ballot – the Twelfth Amendment to the U.S. Constitution was passed on December 9, 1803 and ratified September 25, 1804. This amendment separates and places on separate ballots candidates running for President and Vice President. In 1824, John Quincy Adams was similarly elected President in the House of Representatives, although Andrew Jackson had received the majority of the popular vote. This election, incidentally, was the first time in American history that the popular vote was actually recorded. As in the historic election of 1800, because neither Adams nor Jackson received a majority of the Electoral College vote, the election was decided again by the popularly elected House of Representatives, which chose Adams. But history and fortune smiled on Andrew Jackson four years later, in 1828, when Old Hickory beat Adams and was elected President, this time winning both the Electoral College and the popular votes. Thereafter, there would be only three other occasions in which Presidents and Vice Presidents were elected by a majority of the Electoral College votes, despite losing the popular vote by slim margins. These were the presidential elections of 1876, 1888 and 2000, in which Republican candidates Rutherford B. Hayes, Benjamin Harrison and George W. Bush were elected President, respectively." Source and further information: http://archive.newsmax.com/archives/articles/2004/11/7/160012.shtml