1 has only 1 factor (1)
2 has only 2 factors (1 and 2)
3 has only 2 factors (1 and 3)
4 has only 3 factors (1, 2, and 4)
6 has 4 factors (1, 2, 3, and 6)
8 has 4 factors (1, 2, 4, and 8)
Numbers having only 2 factors are prime numbers. Their only factors are 1 and themselves. Prime numbers. The only two factors should be 1 and itself.
Ah, let's take a moment to appreciate the number 6. It has four factors: 1, 2, 3, and 6. Each of these numbers can be multiplied together to give us 6. Isn't that just lovely?
-2 and 4; 1 and 1.
The common factors for the numbers 6 and 42 are: * 1 * 2 * 3 * 6
Pick any 4 of the 8 factors of 24 which are: 1, 2, 3, 4, 6, 8, 12, 24
1, 2, 4, 5
21 has the most factors of the four numbers. 19 has 2 factors (1 and 19) 21 has 4 factors (1, 3, 7, 21) 23 has 2 factors (1, 23) 25 has 3 factors (1, 5, 25)
Its factors are: 1, 2, 4 and 8 which makes four of them
If the two prime numbers are different: You get the two prime numbers, plus 1, plus the product. For example, if you multiply 2 x 3 = 6, the factors of 6 are 2, 3, 1, and 6. If the two prime numbers are the same: You get the prime number, 1, and the product. For example 2 x 2 = 4. The factors of 4 are 2, 1, 4.
1 and 8, 2 and 4. both sets of numbers multiply to 8.
0, 1, 2, 3
All composite numbers have more than 2 factors whereas prime numbers have only 2 factors
The other factors could be 4 and 5 or 1 and 20.
Numbers having only 2 factors are prime numbers. Their only factors are 1 and themselves. Prime numbers. The only two factors should be 1 and itself.
If you multiply two different prime numbers together, you will have a number with four factors, because it will have those two numbers as factors, as well as 1 and itself. Examples: 3 x 5 = 15 which has the factors 1, 3, 5, and 15. 2 x 11 = 22 which has the factors 1, 2, 11, and 22. 5 x 19 = 95 which has the factors 1, 5, 19, and 95.
A number with two prime factors that are not the same will have only four factors. It will have 1, itself, and those two prime factors as its factors. Examples: 6 = 2 x 3. Its factors are 1, 2, 3, and 6. 15 = 3 x 5. Its factors are 1, 3, 5, and 15. 77 = 7 x 11. Its factors are 1, 7, 11, and 77. Counter-examples: 4 = 2 x 2. Its factors are 1, 2, and 4. 12 = 2 x 2 x 3. Its factors are 1, 2, 3, 4, 6, and 12. 30 = 2 x 3 x 5. Its factors are 1, 2, 3, 5, 6, 10, 15, and 30. 45 = 3 x 3 x 5. Its factors are 1, 3, 5, 9, 15, and 45.
All of the numbers from 1 to 100 are the factors in the set of numbers from 2 to 100.