$${ 3 }^{ 2 } \times { 9 }^{ 2 } \times { 5 }^{ 2 } \sqrt{ 2 } \times { 1 }^{ 2 } { 2 }^{ 2 } { 3 }^{ 2 } { 4 }^{ 2 } { 5 }^{ 2 } { 6 }^{ 2 } { 7 }^{ 2 } { 8 }^{ 2 } { 9 }^{ 2 }$$
$2399902525440000\sqrt{2}\approx 3.3939747 \cdot 10^{15}$
$$3^{4}\times 9^{2}\times 5^{2}\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 5^{2}\times 6^{2}\times 7^{2}\times 8^{2}\times 9^{2}$$
$$3^{4}\times 9^{4}\times 5^{2}\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 5^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$3^{4}\times 9^{4}\times 5^{4}\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$81\times 9^{4}\times 5^{4}\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$81\times 6561\times 5^{4}\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$531441\times 5^{4}\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$531441\times 625\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$332150625\sqrt{2}\times 1^{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$332150625\sqrt{2}\times 1\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$332150625\sqrt{2}\times 2^{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$332150625\sqrt{2}\times 4\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$1328602500\sqrt{2}\times 4^{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$1328602500\sqrt{2}\times 16\times 6^{2}\times 7^{2}\times 8^{2}$$
$$21257640000\sqrt{2}\times 6^{2}\times 7^{2}\times 8^{2}$$
$$21257640000\sqrt{2}\times 36\times 7^{2}\times 8^{2}$$
$$765275040000\sqrt{2}\times 7^{2}\times 8^{2}$$
$$765275040000\sqrt{2}\times 49\times 8^{2}$$
$$37498476960000\sqrt{2}\times 8^{2}$$
$$37498476960000\sqrt{2}\times 64$$
$$2399902525440000\sqrt{2}$$
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