It is the latest in a series of boat departures from Myanmar and Bangladesh, from where Rohingya Muslims have attempted to flee to Malaysia in recent weeks, raising fears of a fresh wave of such dangerous voyages after a 2015 crackdown on people smugglers.
Immigration authorities told Reuters they were on their way to the region to question the group.
"Their boat is still working and they have fuel, so we don't know why they entered our area," said Razali, who goes by one name, in Kuala Idi on the eastern coast of Aceh where the boat landed.
The men were mostly in their 20s, he said.
It was not immediately clear if the boat had originated in Myanmar or Bangladesh. Thousands of Rohingya landed in Indonesia and Malaysia in 2015 after they were left stranded in the Andaman Sea in the wake of a crackdown on people smugglers.
Myanmar regards Rohingya as illegal migrants from the Indian subcontinent and has confined tens of thousands to sprawling camps in Rakhine state since violence swept the area in 2012.
More than 700,000 Rohingya crossed into Bangladesh last year fleeing an army crackdown in the north of Rakhine State, according to U.N. agencies.
The latest departures come as Myanmar prepares to take some of the refugees back after agreeing with Bangladesh to start repatriations on Nov. 15, despite widespread opposition from Rohingya, who say they will not return without guarantees of basic rights, including citizenship and freedom of movement. (Reporting by a Reuters stringer in Banda Aceh Writing by Kanupriya Kapoor Editing by Paul Tait)
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