Final answer:
The expression 4 + 15a + 16b contains terms with factors: 1, 2, 4 for the constant 4; 1, 3, 5, 15 combined with 'a' for 15a; and 1, 2, 4, 8, 16 combined with 'b' for 16b.
Step-by-step explanation:
The factors of the terms in the expression 4 + 15a + 16b can be identified individually. For the constant term 4, the factors are 1, 2, and 4 itself because these numbers can be multiplied together to give the product of 4. For the term 15a, the factors are 1, 3, 5, and 15, combined with the variable 'a'. And for the term 16b, the factors are 1, 2, 4, 8, and 16, combined with the variable 'b'. Factors are the numbers you can multiply together to get another number. In terms of algebraic expressions, each term's factors include its coefficients and any variables that are part of that term, where the coefficient is the numerical part of the term.