👉 In mathematics, a "compendiary" is an element that can be written as a product of two or more smaller elements. In other words, it is a number that can be expressed in terms of its factors.
For example, 18 can be expressed as the product of 2 and 9, since 18 = 2
9. Similarly, 40 can be expressed as the product of 5 and 8, since 40 = 5