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346 has four factors: 1, 2, 173, 346.
2 and 173, 1 and 346
18.601075237738274 x 18.601075237738274 = 346
A number that has exactly two (positive) factors is called a prime number. For instance, the only factors of 7 are 1 and 7.
All numbers have factors. Some numbers have only two factors, the number one and the number itself. These are known as prime numbers. 7 has two factors: 1 and 7. 7 is a prime number.