13 divided by the sum of two natural numbers, the maximum product is 6×7=42.

13 is decomposed into the sum of three natural numbers, and the maximum product is 4×4×5=80.

13 is decomposed into the sum of four natural numbers, and the maximum product is 3×3×3×4= 108.

13 is decomposed into the sum of five natural numbers, and the maximum product is 2×2×3×3 = 108.

13 is decomposed into the sum of six natural numbers, and the maximum product is 2×2×2×2×3=96.

13 is decomposed into the sum of seven natural numbers, and the maximum product is 2× 2× 2× 2× 1 = 64.

13 is decomposed into the sum of eight natural numbers, and the maximum product is 2× 2× 2× 2×/kloc-0 /×/kloc-0 /×1= 32.

13 is decomposed into the sum of nine natural numbers, and the maximum product is 2× 2× 2×/kloc-0 /×/kloc-0 /×/kloc-0 /×1=16.

13 is decomposed into the sum of 10 natural numbers, and the maximum product is 2× 2× 2×/kloc-0 /×/kloc-0 /×/kloc-0 /×/kloc-0 /×1× 65438+.

13 is decomposed into the sum of 1 1 natural numbers, and the maximum product is 2× 2×/kloc-0 /×/kloc-0 /×/kloc-0 /×/kloc-0 /× 65433.

13 is decomposed into the sum of 12 natural numbers, and the maximum product is 2 ×1×1×1×1×/kloc-0.

13 is decomposed into the sum of 13 natural numbers. The maximum product is/kloc-0 /×/kloc-0 /×/kloc-0 /×/kloc-0 /×/kloc-0 /×/kloc-0 /× 65438+.