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To get the Greates Common Factor (GCF) of 16807 and 2401 we need to factor each value first and then we choose all the copies of factors and multiply them:
|2401: ||7||7||7||7|| |
|GCF: ||7||7||7||7|| |
The Greates Common Factor (GCF) is: 7 x 7 x 7 x 7 = 2401