A factor of a number is an integer that divides the number evenly (without remainder). So 2 and 3 are factors of 12 (12/2 is 6 and 12/3 is 4), but 7 is not a factor of 12 (12/7 is 1 remainder 5). 2 and 3 are not factors of 5 (notice 5 is prime).
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1 and 3
12 is a multiple of 3. It is not a factor of 6. 6 is a factor of 12.
The process of prime factorisation is one of repeated division by primes, while obtaining a quotient without a remainder, until the process yields a quotient of 1 3024 ÷ 2 = 1512 ................................. 2 is a prime factor of 3024 1512 ÷ 2 = 756 ................................... 2 is a prime factor of 3024 756 ÷ 2 = 378 ..................................... 2 is a prime factor of 3024 378 ÷ 2 = 189 ..................................... 2 is a prime factor of 3024 189 is not divisible by 2 189 ÷ 3 = 63 ....................................... 3 is a prime factor of 3024 63 ÷ 3 = 21 ......................................... 3 is a prime factor of 3024 21 ÷ 3 = 7 ........................................... 3 is a prime factor of 3024 7 is not divisible by 3 7 ÷ 7 = 1 ............................................. 7 is a prime factor of 3024 So the prime factors of 3024 are 2, 2, 2, 2, 3, 3, 3 and 7
4 is not a factor of 18 and is a factor of both 8 and 12
150 75, 2 25, 3, 2 5, 5, 3, 2