In mathematics, a divisor of an integer n, also called a factor of n,'s an integer which evenly divides n without leaving a remainder. Explanation For example, 7's a divisor of 42 because 42/7 = 6. It can also be said that 42's divisible by 7, 42's a multiple of 7, 7 divides 42, or 7's a factor of 42. It usually written with a vertical bar between the two numbers, like 7 | 42. For example, the positive divisors of 42 are 1, 2, 3, 6, 7, 14, 21, 42. In general, it's said m | n (read as "m divide… (More on Divisibility)