18587985

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{173}}^1$

素因数の和:242

約数の個数: 64

約数和(自身を含む): 35078400

約数和(自身を除く): 16490415

約数列:

[1, 3, 5, 13, 15, 19, 29, 39, 57, 65, 87, 95, 145, 173, 195, 247, 285, 377, 435, 519, 551, 741, 865, 1131, 1235, 1653, 1885, 2249, 2595, 2755, 3287, 3705, 5017, 5655, 6747, 7163, 8265, 9861, 11245, 15051, 16435, 21489, 25085, 33735, 35815, 42731, 49305, 65221, 75255, 95323, 107445, 128193, 195663, 213655, 285969, 326105, 476615, 640965, 978315, 1239199, 1429845, 3717597, 6195995, 18587985]

約数ペア:

[(1, 18587985), (3, 6195995), (5, 3717597), (13, 1429845), (15, 1239199), (19, 978315), (29, 640965), (39, 476615), (57, 326105), (65, 285969), (87, 213655), (95, 195663), (145, 128193), (173, 107445), (195, 95323), (247, 75255), (285, 65221), (377, 49305), (435, 42731), (519, 35815), (551, 33735), (741, 25085), (865, 21489), (1131, 16435), (1235, 15051), (1653, 11245), (1885, 9861), (2249, 8265), (2595, 7163), (2755, 6747), (3287, 5655), (3705, 5017)]