what is the factor of (a+b)(a^2-ab+b^2)?

The factors of what is the factor of (a+b)(a^2-ab+b^2)

are 1, (a+b)(a^2-ab+b^2), (a+b) and (a^2-ab+b^2)

so there are 4 factors but normal we take the first 2 for granted and don't worry about them much

so the factors are

(a+b) and (a^2-ab+b^2)