19905825

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 35364800

約数和(自身を除く): 15458975

約数列:

[1, 3, 5, 15, 19, 25, 57, 61, 75, 95, 183, 229, 285, 305, 475, 687, 915, 1145, 1159, 1425, 1525, 3435, 3477, 4351, 4575, 5725, 5795, 13053, 13969, 17175, 17385, 21755, 28975, 41907, 65265, 69845, 86925, 108775, 209535, 265411, 326325, 349225, 796233, 1047675, 1327055, 3981165, 6635275, 19905825]

約数ペア:

[(1, 19905825), (3, 6635275), (5, 3981165), (15, 1327055), (19, 1047675), (25, 796233), (57, 349225), (61, 326325), (75, 265411), (95, 209535), (183, 108775), (229, 86925), (285, 69845), (305, 65265), (475, 41907), (687, 28975), (915, 21755), (1145, 17385), (1159, 17175), (1425, 13969), (1525, 13053), (3435, 5795), (3477, 5725), (4351, 4575)]