Multiple choice general knowledge math & puzzles 3^71 + 3^72 + 3^73 is divisible by : 34 26 19 39 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Factor out 3^71: 3^71(1 + 3 + 9) = 3^71 × 13. Since 13 divides the expression, and 39 = 3 × 13, the expression is divisible by 39. Check: 34, 26, and 19 are not factors of 13 or 3.