20378260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{163}}^1$

素因数の和:245

約数の個数: 96

約数和(自身を含む): 52899840

約数和(自身を除く): 32521580

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 47, 70, 76, 94, 95, 133, 140, 163, 188, 190, 235, 266, 326, 329, 380, 470, 532, 652, 658, 665, 815, 893, 940, 1141, 1316, 1330, 1630, 1645, 1786, 2282, 2660, 3097, 3260, 3290, 3572, 4465, 4564, 5705, 6194, 6251, 6580, 7661, 8930, 11410, 12388, 12502, 15322, 15485, 17860, 21679, 22820, 25004, 30644, 30970, 31255, 38305, 43358, 53627, 61940, 62510, 76610, 86716, 107254, 108395, 125020, 145559, 153220, 214508, 216790, 268135, 291118, 433580, 536270, 582236, 727795, 1018913, 1072540, 1455590, 2037826, 2911180, 4075652, 5094565, 10189130, 20378260]

約数ペア:

[(1, 20378260), (2, 10189130), (4, 5094565), (5, 4075652), (7, 2911180), (10, 2037826), (14, 1455590), (19, 1072540), (20, 1018913), (28, 727795), (35, 582236), (38, 536270), (47, 433580), (70, 291118), (76, 268135), (94, 216790), (95, 214508), (133, 153220), (140, 145559), (163, 125020), (188, 108395), (190, 107254), (235, 86716), (266, 76610), (326, 62510), (329, 61940), (380, 53627), (470, 43358), (532, 38305), (652, 31255), (658, 30970), (665, 30644), (815, 25004), (893, 22820), (940, 21679), (1141, 17860), (1316, 15485), (1330, 15322), (1630, 12502), (1645, 12388), (1786, 11410), (2282, 8930), (2660, 7661), (3097, 6580), (3260, 6251), (3290, 6194), (3572, 5705), (4465, 4564)]