20001904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1$

素因数の和:194

約数の個数: 80

約数和(自身を含む): 45122112

約数和(自身を除く): 25120208

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 37, 46, 52, 74, 92, 104, 113, 148, 184, 208, 226, 296, 299, 368, 452, 481, 592, 598, 851, 904, 962, 1196, 1469, 1702, 1808, 1924, 2392, 2599, 2938, 3404, 3848, 4181, 4784, 5198, 5876, 6808, 7696, 8362, 10396, 11063, 11752, 13616, 16724, 20792, 22126, 23504, 33448, 33787, 41584, 44252, 54353, 66896, 67574, 88504, 96163, 108706, 135148, 177008, 192326, 217412, 270296, 384652, 434824, 540592, 769304, 869648, 1250119, 1538608, 2500238, 5000476, 10000952, 20001904]

約数ペア:

[(1, 20001904), (2, 10000952), (4, 5000476), (8, 2500238), (13, 1538608), (16, 1250119), (23, 869648), (26, 769304), (37, 540592), (46, 434824), (52, 384652), (74, 270296), (92, 217412), (104, 192326), (113, 177008), (148, 135148), (184, 108706), (208, 96163), (226, 88504), (296, 67574), (299, 66896), (368, 54353), (452, 44252), (481, 41584), (592, 33787), (598, 33448), (851, 23504), (904, 22126), (962, 20792), (1196, 16724), (1469, 13616), (1702, 11752), (1808, 11063), (1924, 10396), (2392, 8362), (2599, 7696), (2938, 6808), (3404, 5876), (3848, 5198), (4181, 4784)]