20921040

素因数分解:

$2^4\times 3^2\times 5^1\times 7^2\times {\mathrm{593}}^1$

素因数の和:626

約数の個数: 180

約数和(自身を含む): 81868644

約数和(自身を除く): 60947604

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 49, 56, 60, 63, 70, 72, 80, 84, 90, 98, 105, 112, 120, 126, 140, 144, 147, 168, 180, 196, 210, 240, 245, 252, 280, 294, 315, 336, 360, 392, 420, 441, 490, 504, 560, 588, 593, 630, 720, 735, 784, 840, 882, 980, 1008, 1176, 1186, 1260, 1470, 1680, 1764, 1779, 1960, 2205, 2352, 2372, 2520, 2940, 2965, 3528, 3558, 3920, 4151, 4410, 4744, 5040, 5337, 5880, 5930, 7056, 7116, 8302, 8820, 8895, 9488, 10674, 11760, 11860, 12453, 14232, 16604, 17640, 17790, 20755, 21348, 23720, 24906, 26685, 28464, 29057, 33208, 35280, 35580, 37359, 41510, 42696, 47440, 49812, 53370, 58114, 62265, 66416, 71160, 74718, 83020, 85392, 87171, 99624, 106740, 116228, 124530, 142320, 145285, 149436, 166040, 174342, 186795, 199248, 213480, 232456, 249060, 261513, 290570, 298872, 332080, 348684, 373590, 426960, 435855, 464912, 498120, 523026, 581140, 597744, 697368, 747180, 871710, 996240, 1046052, 1162280, 1307565, 1394736, 1494360, 1743420, 2092104, 2324560, 2615130, 2988720, 3486840, 4184208, 5230260, 6973680, 10460520, 20921040]

約数ペア:

[(1, 20921040), (2, 10460520), (3, 6973680), (4, 5230260), (5, 4184208), (6, 3486840), (7, 2988720), (8, 2615130), (9, 2324560), (10, 2092104), (12, 1743420), (14, 1494360), (15, 1394736), (16, 1307565), (18, 1162280), (20, 1046052), (21, 996240), (24, 871710), (28, 747180), (30, 697368), (35, 597744), (36, 581140), (40, 523026), (42, 498120), (45, 464912), (48, 435855), (49, 426960), (56, 373590), (60, 348684), (63, 332080), (70, 298872), (72, 290570), (80, 261513), (84, 249060), (90, 232456), (98, 213480), (105, 199248), (112, 186795), (120, 174342), (126, 166040), (140, 149436), (144, 145285), (147, 142320), (168, 124530), (180, 116228), (196, 106740), (210, 99624), (240, 87171), (245, 85392), (252, 83020), (280, 74718), (294, 71160), (315, 66416), (336, 62265), (360, 58114), (392, 53370), (420, 49812), (441, 47440), (490, 42696), (504, 41510), (560, 37359), (588, 35580), (593, 35280), (630, 33208), (720, 29057), (735, 28464), (784, 26685), (840, 24906), (882, 23720), (980, 21348), (1008, 20755), (1176, 17790), (1186, 17640), (1260, 16604), (1470, 14232), (1680, 12453), (1764, 11860), (1779, 11760), (1960, 10674), (2205, 9488), (2352, 8895), (2372, 8820), (2520, 8302), (2940, 7116), (2965, 7056), (3528, 5930), (3558, 5880), (3920, 5337), (4151, 5040), (4410, 4744)]