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Anonymous
None. 7 is a Prime number.
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The prime factors are: 2 x 7 x 7 x 7 x 7
As a product of its prime factors: 3*3*5*5*7 = 1575
98 = 2 x 7 x 7
The prime factors are: 2, 3 and 7. (2*3*7 = 42)