👉 In mathematics, a factorable number is one that can be expressed as a product of two or more prime numbers. These factors are called its prime factors. For example: - 20 = 2 x 2 x 5 - 18 = 2 x 3^2 A number is said to be factorable if it has at least one positive integer divisor that can divide the whole number completely, making the whole number itself a product of its prime factors.