20887888

素因数分解:

$2^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 49104000

約数和(自身を除く): 28216112

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 56, 58, 59, 109, 112, 116, 118, 203, 218, 232, 236, 406, 413, 436, 464, 472, 763, 812, 826, 872, 944, 1526, 1624, 1652, 1711, 1744, 3052, 3161, 3248, 3304, 3422, 6104, 6322, 6431, 6608, 6844, 11977, 12208, 12644, 12862, 13688, 22127, 23954, 25288, 25724, 27376, 44254, 45017, 47908, 50576, 51448, 88508, 90034, 95816, 102896, 177016, 180068, 186499, 191632, 354032, 360136, 372998, 720272, 745996, 1305493, 1491992, 2610986, 2983984, 5221972, 10443944, 20887888]

約数ペア:

[(1, 20887888), (2, 10443944), (4, 5221972), (7, 2983984), (8, 2610986), (14, 1491992), (16, 1305493), (28, 745996), (29, 720272), (56, 372998), (58, 360136), (59, 354032), (109, 191632), (112, 186499), (116, 180068), (118, 177016), (203, 102896), (218, 95816), (232, 90034), (236, 88508), (406, 51448), (413, 50576), (436, 47908), (464, 45017), (472, 44254), (763, 27376), (812, 25724), (826, 25288), (872, 23954), (944, 22127), (1526, 13688), (1624, 12862), (1652, 12644), (1711, 12208), (1744, 11977), (3052, 6844), (3161, 6608), (3248, 6431), (3304, 6322), (3422, 6104)]