21404880

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1$

素因数の和:194

約数の個数: 240

約数和(自身を含む): 85423104

約数和(自身を除く): 64018224

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 31, 35, 36, 40, 42, 45, 48, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 105, 112, 120, 124, 126, 137, 140, 144, 155, 168, 180, 186, 210, 217, 240, 248, 252, 274, 279, 280, 310, 315, 336, 360, 372, 411, 420, 434, 465, 496, 504, 548, 558, 560, 620, 630, 651, 685, 720, 744, 822, 840, 868, 930, 959, 1008, 1085, 1096, 1116, 1233, 1240, 1260, 1302, 1370, 1395, 1488, 1644, 1680, 1736, 1860, 1918, 1953, 2055, 2170, 2192, 2232, 2466, 2480, 2520, 2604, 2740, 2790, 2877, 3255, 3288, 3472, 3720, 3836, 3906, 4110, 4247, 4340, 4464, 4795, 4932, 5040, 5208, 5480, 5580, 5754, 6165, 6510, 6576, 7440, 7672, 7812, 8220, 8494, 8631, 8680, 9590, 9765, 9864, 10416, 10960, 11160, 11508, 12330, 12741, 13020, 14385, 15344, 15624, 16440, 16988, 17262, 17360, 19180, 19530, 19728, 21235, 22320, 23016, 24660, 25482, 26040, 28770, 29729, 31248, 32880, 33976, 34524, 38223, 38360, 39060, 42470, 43155, 46032, 49320, 50964, 52080, 57540, 59458, 63705, 67952, 69048, 76446, 76720, 78120, 84940, 86310, 89187, 98640, 101928, 115080, 118916, 127410, 138096, 148645, 152892, 156240, 169880, 172620, 178374, 191115, 203856, 230160, 237832, 254820, 267561, 297290, 305784, 339760, 345240, 356748, 382230, 445935, 475664, 509640, 535122, 594580, 611568, 690480, 713496, 764460, 891870, 1019280, 1070244, 1189160, 1337805, 1426992, 1528920, 1783740, 2140488, 2378320, 2675610, 3057840, 3567480, 4280976, 5351220, 7134960, 10702440, 21404880]

約数ペア:

[(1, 21404880), (2, 10702440), (3, 7134960), (4, 5351220), (5, 4280976), (6, 3567480), (7, 3057840), (8, 2675610), (9, 2378320), (10, 2140488), (12, 1783740), (14, 1528920), (15, 1426992), (16, 1337805), (18, 1189160), (20, 1070244), (21, 1019280), (24, 891870), (28, 764460), (30, 713496), (31, 690480), (35, 611568), (36, 594580), (40, 535122), (42, 509640), (45, 475664), (48, 445935), (56, 382230), (60, 356748), (62, 345240), (63, 339760), (70, 305784), (72, 297290), (80, 267561), (84, 254820), (90, 237832), (93, 230160), (105, 203856), (112, 191115), (120, 178374), (124, 172620), (126, 169880), (137, 156240), (140, 152892), (144, 148645), (155, 138096), (168, 127410), (180, 118916), (186, 115080), (210, 101928), (217, 98640), (240, 89187), (248, 86310), (252, 84940), (274, 78120), (279, 76720), (280, 76446), (310, 69048), (315, 67952), (336, 63705), (360, 59458), (372, 57540), (411, 52080), (420, 50964), (434, 49320), (465, 46032), (496, 43155), (504, 42470), (548, 39060), (558, 38360), (560, 38223), (620, 34524), (630, 33976), (651, 32880), (685, 31248), (720, 29729), (744, 28770), (822, 26040), (840, 25482), (868, 24660), (930, 23016), (959, 22320), (1008, 21235), (1085, 19728), (1096, 19530), (1116, 19180), (1233, 17360), (1240, 17262), (1260, 16988), (1302, 16440), (1370, 15624), (1395, 15344), (1488, 14385), (1644, 13020), (1680, 12741), (1736, 12330), (1860, 11508), (1918, 11160), (1953, 10960), (2055, 10416), (2170, 9864), (2192, 9765), (2232, 9590), (2466, 8680), (2480, 8631), (2520, 8494), (2604, 8220), (2740, 7812), (2790, 7672), (2877, 7440), (3255, 6576), (3288, 6510), (3472, 6165), (3720, 5754), (3836, 5580), (3906, 5480), (4110, 5208), (4247, 5040), (4340, 4932), (4464, 4795)]