One has one factor.
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at least three factors.
2 factors, but a prime number has only two factors (itself and one). Note that 1 is not considered to be a prime number.
abcabc=abc x 1001 1001 = 7 x 11 x 13 So such number as at least 4 prime factors: if abc is prime, then 4 factors only if abc is not prime then at least 4 factors
There cannot be a least common factor of just one number. To be common there need to be at least two numbers.
There cannot be common factors of just one number. To be common there need to be at least two numbers.