2, 4, 8, 16, 32, 64, 128, 256, 512
Not a lot. They're both prime numbers. A factor that is prime is used to make other numbers.
41, 43 and 47 are the prime numbers between 40 and 50. Any nonzero number can be a factor.
All numbers have factors. Some factors are prime numbers. A prime factor is a factor that is a prime number. A common prime factor is a prime factor that appears on the list of factors of two or more given numbers.
All numbers have factors. Some factors are prime numbers, some are not.
170
The least common factor of any set of numbers is 1.
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All prime numbers have a common factor of 1.
Prime numbers have one distinct prime factor.
Prime numbers.
Since prime numbers only have one prime factor (themselves), factor trees are unnecessary.
30 has three prime numbers and is a factor of 60.