21509280

素因数分解:

$2^5\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{383}}^1$

素因数の和:420

約数の個数: 192

約数和(自身を含む): 81285120

約数和(自身を除く): 59775840

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 32, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 80, 90, 96, 104, 108, 117, 120, 130, 135, 144, 156, 160, 180, 195, 208, 216, 234, 240, 260, 270, 288, 312, 351, 360, 383, 390, 416, 432, 468, 480, 520, 540, 585, 624, 702, 720, 766, 780, 864, 936, 1040, 1080, 1149, 1170, 1248, 1404, 1440, 1532, 1560, 1755, 1872, 1915, 2080, 2160, 2298, 2340, 2808, 3064, 3120, 3447, 3510, 3744, 3830, 4320, 4596, 4680, 4979, 5616, 5745, 6128, 6240, 6894, 7020, 7660, 9192, 9360, 9958, 10341, 11232, 11490, 12256, 13788, 14040, 14937, 15320, 17235, 18384, 18720, 19916, 20682, 22980, 24895, 27576, 28080, 29874, 30640, 34470, 36768, 39832, 41364, 44811, 45960, 49790, 51705, 55152, 56160, 59748, 61280, 68940, 74685, 79664, 82728, 89622, 91920, 99580, 103410, 110304, 119496, 134433, 137880, 149370, 159328, 165456, 179244, 183840, 199160, 206820, 224055, 238992, 268866, 275760, 298740, 330912, 358488, 398320, 413640, 448110, 477984, 537732, 551520, 597480, 672165, 716976, 796640, 827280, 896220, 1075464, 1194960, 1344330, 1433952, 1654560, 1792440, 2150928, 2389920, 2688660, 3584880, 4301856, 5377320, 7169760, 10754640, 21509280]

約数ペア:

[(1, 21509280), (2, 10754640), (3, 7169760), (4, 5377320), (5, 4301856), (6, 3584880), (8, 2688660), (9, 2389920), (10, 2150928), (12, 1792440), (13, 1654560), (15, 1433952), (16, 1344330), (18, 1194960), (20, 1075464), (24, 896220), (26, 827280), (27, 796640), (30, 716976), (32, 672165), (36, 597480), (39, 551520), (40, 537732), (45, 477984), (48, 448110), (52, 413640), (54, 398320), (60, 358488), (65, 330912), (72, 298740), (78, 275760), (80, 268866), (90, 238992), (96, 224055), (104, 206820), (108, 199160), (117, 183840), (120, 179244), (130, 165456), (135, 159328), (144, 149370), (156, 137880), (160, 134433), (180, 119496), (195, 110304), (208, 103410), (216, 99580), (234, 91920), (240, 89622), (260, 82728), (270, 79664), (288, 74685), (312, 68940), (351, 61280), (360, 59748), (383, 56160), (390, 55152), (416, 51705), (432, 49790), (468, 45960), (480, 44811), (520, 41364), (540, 39832), (585, 36768), (624, 34470), (702, 30640), (720, 29874), (766, 28080), (780, 27576), (864, 24895), (936, 22980), (1040, 20682), (1080, 19916), (1149, 18720), (1170, 18384), (1248, 17235), (1404, 15320), (1440, 14937), (1532, 14040), (1560, 13788), (1755, 12256), (1872, 11490), (1915, 11232), (2080, 10341), (2160, 9958), (2298, 9360), (2340, 9192), (2808, 7660), (3064, 7020), (3120, 6894), (3447, 6240), (3510, 6128), (3744, 5745), (3830, 5616), (4320, 4979), (4596, 4680)]