Turkey has demanded that Saudi authorities tell them where the body is.
Turkish media had previously quoted sources as saying Turkey had audio recordings proving that Khashoggi had been tortured before being murdered.
"Turkey does not want to lose Saudi Arabia at the end of the day", Mahcupyan said.
"We knew that Khashoggi's body was dismembered", Aktay told the newspaper.
Earlier on Friday, Yasin Aktay, an adviser to Erdogan, said that his body was "dissolved" after he was murdered and dismembered.
In this image made from a March 2018 video provided by Metafora Production, Jamal Khashoggi speaks during an interview at an undisclosed location.
Mr Khashoggi, 59, entered the Saudi consulate in Istanbul on October 2 to obtain the documents he needed to marry Ms Cengiz, a Turkish national.
Meanwhile, in the latest development in the month-long investigation into the journalist's death, an advisor to the Turkish President said the body was cut up so it would dissolve easier.
Khashoggi, at the time of his death was a resident of the United States, contributing to the Washington Post, having fallen out with the Riyadh regime.
The "only logical conclusion" was that those who had killed the Saudi journalist in Istanbul had destroyed his body "to leave no trace behind", he said.
The Saudi chief prosecutor arrived in Turkey on Sunday to meet with his Turkish counterpart. Saudi Crown Prince Mohammed bin Salman denounced the murder as "repulsive".
The crown prince's description of Khashoggi, whose articles for the Washington Post were often critical of the ruling royal family, is at odds with public statements he made about Khashoggi. "We can't ignore this because we want to sell more weapons", said Ahmed Bedier of United Voices for America, a USA -based civil society group.
The story was undercut by footage, which Erdogan confirmed, of a Saudi official acting as a body double for Khashoggi, wearing the journalist's clothes when leaving the consulate to pretend to be the dead man.
It emerged this week that the prince called Khashoggi a "dangerous Islamist" in a phone call with Jared Kushner, the White House adviser and son-in-law to Donald Trump, just before Turkish police said they believed the missing journalist was dead.
The squad leader, Salah Muhammad al-Tubaigy, the head of forensic evidence in the Saudi general security department, started cutting Khashoggi's body while he was alive.
Saudi Arabia has attracted worldwide opprobrium for its handling of the case.
Although their U.S. visas have been revoked, Secretary of State Mike Pompeo said it would be a "handful more weeks" before the USA knew enough to impose sanctions on individuals involved in Khashoggi's killing.