20721385440

素因数分解:

$2^5\times 3^3\times 5^1\times 7^1\times {\mathrm{685231}}^1$

素因数の和:685262

約数の個数: 192

約数和(自身を含む): 82885662720

約数和(自身を除く): 62164277280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 54, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 108, 112, 120, 126, 135, 140, 144, 160, 168, 180, 189, 210, 216, 224, 240, 252, 270, 280, 288, 315, 336, 360, 378, 420, 432, 480, 504, 540, 560, 630, 672, 720, 756, 840, 864, 945, 1008, 1080, 1120, 1260, 1440, 1512, 1680, 1890, 2016, 2160, 2520, 3024, 3360, 3780, 4320, 5040, 6048, 7560, 10080, 15120, 30240, 685231, 1370462, 2055693, 2740924, 3426155, 4111386, 4796617, 5481848, 6167079, 6852310, 8222772, 9593234, 10278465, 10963696, 12334158, 13704620, 14389851, 16445544, 18501237, 19186468, 20556930, 21927392, 23983085, 24668316, 27409240, 28779702, 30835395, 32891088, 37002474, 38372936, 41113860, 43169553, 47966170, 49336632, 54818480, 57559404, 61670790, 65782176, 71949255, 74004948, 76745872, 82227720, 86339106, 92506185, 95932340, 98673264, 109636960, 115118808, 123341580, 129508659, 143898510, 148009896, 153491744, 164455440, 172678212, 185012370, 191864680, 197346528, 215847765, 230237616, 246683160, 259017318, 287797020, 296019792, 328910880, 345356424, 370024740, 383729360, 431695530, 460475232, 493366320, 518034636, 575594040, 592039584, 647543295, 690712848, 740049480, 767458720, 863391060, 986732640, 1036069272, 1151188080, 1295086590, 1381425696, 1480098960, 1726782120, 2072138544, 2302376160, 2590173180, 2960197920, 3453564240, 4144277088, 5180346360, 6907128480, 10360692720, 20721385440]

約数ペア:

[(1, 20721385440), (2, 10360692720), (3, 6907128480), (4, 5180346360), (5, 4144277088), (6, 3453564240), (7, 2960197920), (8, 2590173180), (9, 2302376160), (10, 2072138544), (12, 1726782120), (14, 1480098960), (15, 1381425696), (16, 1295086590), (18, 1151188080), (20, 1036069272), (21, 986732640), (24, 863391060), (27, 767458720), (28, 740049480), (30, 690712848), (32, 647543295), (35, 592039584), (36, 575594040), (40, 518034636), (42, 493366320), (45, 460475232), (48, 431695530), (54, 383729360), (56, 370024740), (60, 345356424), (63, 328910880), (70, 296019792), (72, 287797020), (80, 259017318), (84, 246683160), (90, 230237616), (96, 215847765), (105, 197346528), (108, 191864680), (112, 185012370), (120, 172678212), (126, 164455440), (135, 153491744), (140, 148009896), (144, 143898510), (160, 129508659), (168, 123341580), (180, 115118808), (189, 109636960), (210, 98673264), (216, 95932340), (224, 92506185), (240, 86339106), (252, 82227720), (270, 76745872), (280, 74004948), (288, 71949255), (315, 65782176), (336, 61670790), (360, 57559404), (378, 54818480), (420, 49336632), (432, 47966170), (480, 43169553), (504, 41113860), (540, 38372936), (560, 37002474), (630, 32891088), (672, 30835395), (720, 28779702), (756, 27409240), (840, 24668316), (864, 23983085), (945, 21927392), (1008, 20556930), (1080, 19186468), (1120, 18501237), (1260, 16445544), (1440, 14389851), (1512, 13704620), (1680, 12334158), (1890, 10963696), (2016, 10278465), (2160, 9593234), (2520, 8222772), (3024, 6852310), (3360, 6167079), (3780, 5481848), (4320, 4796617), (5040, 4111386), (6048, 3426155), (7560, 2740924), (10080, 2055693), (15120, 1370462), (30240, 685231)]