1808989

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{193}}^1$

素因数の和:316

約数の個数: 16

約数和(自身を含む): 2259712

約数和(自身を除く): 450723

約数列:

[1, 7, 13, 91, 103, 193, 721, 1339, 1351, 2509, 9373, 17563, 19879, 139153, 258427, 1808989]

約数ペア:

[(1, 1808989), (7, 258427), (13, 139153), (91, 19879), (103, 17563), (193, 9373), (721, 2509), (1339, 1351)]