Police recovered the bodies from the Matamuhuri river at Chokoria town Saturday night, some six hours after the boys drowned as they went to bathe in the coastal river following the match.
Local police chief Bakhtiaruddin Chowdhury said that 22 boys from a school played the friendly after dividing themselves between supporters of Brazil and Argentina.
Six of them went swimming afterwards clad in jerseys from the South American rivals.
"The river at that place was very deep. We rescued a boy. Later five bodies were recovered. The dead included two brothers," Chowdhury said.
Tens of thousands joined their funeral on Sunday, he said.