From 1 to 2015, how many numbers can be selected so that the sum of any two of these numbers is divisible by 26?
在1至2015中，最多能选出多少个数，使得这些数任意两个之和都能被26整除？
<gadget id="calculator">26 * 3</gadget>
<output>78</output>

<result>78</result>