It is: 728
Chat with our AI personalities
The GCF is: 13
52
Ah, double 52 is simply adding 52 to itself. So if we take 52 and add another 52 to it, we get a total of 104. It's just like painting with two happy little 52s to create something new and wonderful.
52
1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728