The study titled "World Leaders on Facebook" has been released by Burson Cohn & Wolfe on Wednesday.
That is almost twice the 23.1 million who follow Trump, according to a study by communications firm Burson-Martsteller.
In a separate list by Twiplomacy, United States President Donald Trump has been named "The Most Interactive World Leader", with Indian Prime Minister Narendra Modi securing the second place in the list.
The study, which analysed the activity of 650 personal and institutional Facebook pages of heads of state and government and foreign ministers since January 1, 2017, meanwhile showed that Trump easily counted most interactions on the platform.
He therefore counts "more Facebook fans than Cambodia has Facebook users (7.1 million), but still (fewer) than the 14.4 million Khmer speakers on Facebook", it pointed out. As of March 15, 2018, all pages of world leaders combined had a total of 309.4 million followers. Donal Trump received more than 20.49 crore likes, share and comments on his Facebook posts, whereas Mr Modi received 11.36 crore.
During PM Modi's stint, Pakistan saw two prime ministers at the helm of affairs, but none of them felt the need to use Facebook as a tool to communicate directly with the people.
The first world leader to have his own Facebook page was Former US President Barack Obama.
Facebook has become the key platform for world leaders and governments to engage with voters, supporters and citizens.
It also found that Trump on average posts five times a day on Facebook, which is more than double the number of posts from the Indian premier.
The Government of Pakistan Facebook page ranked third in terms of number of pictures posted while Foreign Ministry of Pakistan made it to the list for liking relevant pages of the other countries.
The survey also revealed that the Prime Minister's Office (PMO) was also the fourth most checked-in destination, after the White House, the Ugandan Presidency and 10, Downing Street which happens to be the official residence of the British Prime Minister.