cukomudo

$= \sum_{i=1}^{16} 10^{i-1} = 1111111111111111$
$ = \sum_{i=1}^{8} 10^{i-1} \times (10^{8} + 1) = 11111111 \times 100000001$
$ = 11111111 \times 100000001$
$ = (11 \times 73 \times 101 \times 137) \times (17 \times 5882353)$