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70 x 7
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489#=Phione 490#=Manaphy
490 = 2 x 5 x 72
Phione(489) and manaphy(490)
The prime factorization for 490 is 7x7x5x2= 490, or 7 to the power of 2 x 5x2
Since 70 is a factor of 490, it is automatically the GCF.