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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.
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What are the 20 factors of 85 with the numbers 50 25 15 5?
85 has four factors.
What Is smallest composite number that has at least four different factors?
All composite numbers have more than 2 factors whereas prime numbers have only 2 factors
Why are there only four factors for 20?
20 has six factors.
numbers with 2 3 5 as factors?
Of the numbers from 1 to 30, only 30 has all three of those numbers as factors.
What are the first ten factors of 8?
8 only has four factors.
