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divisor factors composite number multiples proper factors factor pairs prime number square number a number that has more factors than 1 and itself. the number you divide by 30 ÷ 3 = 10, so 3 is the divisor 20 is composite because its factors are 1, 2, 4, 5, 10, 20 the result of multiplying a number by a whole number, the same thing as skipcounting Multiples of 4 are: 4, 8, 12, 16, 20, 24, 28… numbers that are multiplied to get the product. 5 x 6 = 30, so 5 and 6 are both factors of 30 The factors of 30 are 1, 2, 3, 5, 6, 10, 15, 30 the factors that go together to make a product 5 and 6 are a factor pair of 30 4 and 7 are a factor pair of 28 all the factors of a number except the number itself. The proper factors of 30 are 1, 2, 3, 5, 6, 10, and 15 30 is not a proper factor of 30 a number that can be arranged as a square array 1, 4, 9, 16, 25, 36, 49, 64, … a number that has only 2 factors, 1 and itself. 19 is a prime number because its only factors are 1 and 19 Examples: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41…