Yes, many words are made with the prefix se- meaning "one":
Like sebuah (se + buah = one buah: one "fruit" literally), sebelas (se + belas, belas = teen, sebelas meaning eleven), seekor, etc...
The se- prefix can also mean "a whole",
or can be used as an intensifier for adverbs:
https://forum.duolingo.com/comment/37185038