Both 5 and 7 are prime numbers, so the only number that could go into both evenly would be 1.
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1,2,3,4,6,9,13,18,26,54.
11 times 7
14 can be evenly divided by -14, -7, -2, -1, 1, 2, 7, and 14.
They are all prime numbers, so the no whole number goes into 5, 3, and 7 evenly. However, if one assumes that "evenly" means a multiple of 2, and that we can use any number, not just whole numbers, then any fraction of the form 1/2N (where N is any whole number) will go "evenly" into 7, 5, and 3.
These numbers all go into 385 evenly: 1, 5, 7, 11, 35, 55, 77, 385.