2
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85 ----------------- Only two - they are 1 and 11.
11 is a prime number. Therefore the only factors of 11 is 1 and 11.
All the factors of 11 are 1,11. Because 11x1=11 and nothing else does. All the factors of 11 are 1,11.Because 11x1=11 and nothing else does.
Factors: 286=2*11*13 429=3*11*13 Common factors: 11, 13
11