undividable vs indivisible by

undividable and indivisible by both are adjectives.

Word	Noun	Adjective	Verb	Adverb
undividable	No	Yes	No	No
indivisible by	No	Yes	No	No

As adjectives, undividable and indivisible by are synonyms defined as:

undividable and indivisible by: cannot be divided without leaving a remainder

undividable (adjective)	indivisible by (adjective)
cannot be divided without leaving a remainder	cannot be divided without leaving a remainder