18785655

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{193}}^1$

素因数の和:317

約数の個数: 64

約数和(自身を含む): 38737920

約数和(自身を除く): 19952265

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 103, 105, 135, 189, 193, 309, 315, 515, 579, 721, 927, 945, 965, 1351, 1545, 1737, 2163, 2781, 2895, 3605, 4053, 4635, 5211, 6489, 6755, 8685, 10815, 12159, 13905, 19467, 19879, 20265, 26055, 32445, 36477, 59637, 60795, 97335, 99395, 139153, 178911, 182385, 298185, 417459, 536733, 695765, 894555, 1252377, 2087295, 2683665, 3757131, 6261885, 18785655]

約数ペア:

[(1, 18785655), (3, 6261885), (5, 3757131), (7, 2683665), (9, 2087295), (15, 1252377), (21, 894555), (27, 695765), (35, 536733), (45, 417459), (63, 298185), (103, 182385), (105, 178911), (135, 139153), (189, 99395), (193, 97335), (309, 60795), (315, 59637), (515, 36477), (579, 32445), (721, 26055), (927, 20265), (945, 19879), (965, 19467), (1351, 13905), (1545, 12159), (1737, 10815), (2163, 8685), (2781, 6755), (2895, 6489), (3605, 5211), (4053, 4635)]