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319
Rounded to the nearest tens, 319 is 320. Rounded to the nearest hundred 319 is 300.
319 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 4 factors of 319 are 1, 11, 29, and 319.The factor pairs of 319 are 1 x 319 and 11 x 29.The proper factors of 319 are 1, 11, and 29 or,if the definition you are using excludes 1, they are 11 and 29.The prime factors of 319 are 11 and 29.The 2 distinct prime factors (listing each prime factor only once) of 319 are 11 and 29.The prime factorization of 319 is 11 x 29.NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.
The factors of 638 are 1, 2, 11, 22, 29, 58, 319, and 638. The prime factorization of 638 is 2 x 11 x 29.
1 x 320, 2 x 160, 4 x 80, 5 x 64, 8 x 40, 10 x 32, 16 x 20.