21278880

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{2111}}^1$

素因数の和:2139

約数の個数: 144

約数和(自身を含む): 83026944

約数和(自身を除く): 61748064

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 210, 224, 240, 252, 280, 288, 315, 336, 360, 420, 480, 504, 560, 630, 672, 720, 840, 1008, 1120, 1260, 1440, 1680, 2016, 2111, 2520, 3360, 4222, 5040, 6333, 8444, 10080, 10555, 12666, 14777, 16888, 18999, 21110, 25332, 29554, 31665, 33776, 37998, 42220, 44331, 50664, 59108, 63330, 67552, 73885, 75996, 84440, 88662, 94995, 101328, 118216, 126660, 132993, 147770, 151992, 168880, 177324, 189990, 202656, 221655, 236432, 253320, 265986, 295540, 303984, 337760, 354648, 379980, 443310, 472864, 506640, 531972, 591080, 607968, 664965, 709296, 759960, 886620, 1013280, 1063944, 1182160, 1329930, 1418592, 1519920, 1773240, 2127888, 2364320, 2659860, 3039840, 3546480, 4255776, 5319720, 7092960, 10639440, 21278880]

約数ペア:

[(1, 21278880), (2, 10639440), (3, 7092960), (4, 5319720), (5, 4255776), (6, 3546480), (7, 3039840), (8, 2659860), (9, 2364320), (10, 2127888), (12, 1773240), (14, 1519920), (15, 1418592), (16, 1329930), (18, 1182160), (20, 1063944), (21, 1013280), (24, 886620), (28, 759960), (30, 709296), (32, 664965), (35, 607968), (36, 591080), (40, 531972), (42, 506640), (45, 472864), (48, 443310), (56, 379980), (60, 354648), (63, 337760), (70, 303984), (72, 295540), (80, 265986), (84, 253320), (90, 236432), (96, 221655), (105, 202656), (112, 189990), (120, 177324), (126, 168880), (140, 151992), (144, 147770), (160, 132993), (168, 126660), (180, 118216), (210, 101328), (224, 94995), (240, 88662), (252, 84440), (280, 75996), (288, 73885), (315, 67552), (336, 63330), (360, 59108), (420, 50664), (480, 44331), (504, 42220), (560, 37998), (630, 33776), (672, 31665), (720, 29554), (840, 25332), (1008, 21110), (1120, 18999), (1260, 16888), (1440, 14777), (1680, 12666), (2016, 10555), (2111, 10080), (2520, 8444), (3360, 6333), (4222, 5040)]