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Two hundred eighty-four (284, CCLXXXIV) is the natural number following 283 and preceding 285. Its divisors are 1, 2, 4, 71, and 142, making it an amicable number with 280; and its factorization is
<math>284 = 2^2 \cdot 71<math>
There is no answer to the equation φ(x) = 284, making 284 a nontotient.
See also: two hundred
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