21041280

素因数分解:

$2^7\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{281}}^1$

素因数の和:319

約数の個数: 192

約数和(自身を含む): 78525720

約数和(自身を除く): 57484440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 30, 32, 36, 39, 40, 45, 48, 52, 60, 64, 65, 72, 78, 80, 90, 96, 104, 117, 120, 128, 130, 144, 156, 160, 180, 192, 195, 208, 234, 240, 260, 281, 288, 312, 320, 360, 384, 390, 416, 468, 480, 520, 562, 576, 585, 624, 640, 720, 780, 832, 843, 936, 960, 1040, 1124, 1152, 1170, 1248, 1405, 1440, 1560, 1664, 1686, 1872, 1920, 2080, 2248, 2340, 2496, 2529, 2810, 2880, 3120, 3372, 3653, 3744, 4160, 4215, 4496, 4680, 4992, 5058, 5620, 5760, 6240, 6744, 7306, 7488, 8320, 8430, 8992, 9360, 10116, 10959, 11240, 12480, 12645, 13488, 14612, 14976, 16860, 17984, 18265, 18720, 20232, 21918, 22480, 24960, 25290, 26976, 29224, 32877, 33720, 35968, 36530, 37440, 40464, 43836, 44960, 50580, 53952, 54795, 58448, 65754, 67440, 73060, 74880, 80928, 87672, 89920, 101160, 107904, 109590, 116896, 131508, 134880, 146120, 161856, 164385, 175344, 179840, 202320, 219180, 233792, 263016, 269760, 292240, 323712, 328770, 350688, 404640, 438360, 467584, 526032, 539520, 584480, 657540, 701376, 809280, 876720, 1052064, 1168960, 1315080, 1402752, 1618560, 1753440, 2104128, 2337920, 2630160, 3506880, 4208256, 5260320, 7013760, 10520640, 21041280]

約数ペア:

[(1, 21041280), (2, 10520640), (3, 7013760), (4, 5260320), (5, 4208256), (6, 3506880), (8, 2630160), (9, 2337920), (10, 2104128), (12, 1753440), (13, 1618560), (15, 1402752), (16, 1315080), (18, 1168960), (20, 1052064), (24, 876720), (26, 809280), (30, 701376), (32, 657540), (36, 584480), (39, 539520), (40, 526032), (45, 467584), (48, 438360), (52, 404640), (60, 350688), (64, 328770), (65, 323712), (72, 292240), (78, 269760), (80, 263016), (90, 233792), (96, 219180), (104, 202320), (117, 179840), (120, 175344), (128, 164385), (130, 161856), (144, 146120), (156, 134880), (160, 131508), (180, 116896), (192, 109590), (195, 107904), (208, 101160), (234, 89920), (240, 87672), (260, 80928), (281, 74880), (288, 73060), (312, 67440), (320, 65754), (360, 58448), (384, 54795), (390, 53952), (416, 50580), (468, 44960), (480, 43836), (520, 40464), (562, 37440), (576, 36530), (585, 35968), (624, 33720), (640, 32877), (720, 29224), (780, 26976), (832, 25290), (843, 24960), (936, 22480), (960, 21918), (1040, 20232), (1124, 18720), (1152, 18265), (1170, 17984), (1248, 16860), (1405, 14976), (1440, 14612), (1560, 13488), (1664, 12645), (1686, 12480), (1872, 11240), (1920, 10959), (2080, 10116), (2248, 9360), (2340, 8992), (2496, 8430), (2529, 8320), (2810, 7488), (2880, 7306), (3120, 6744), (3372, 6240), (3653, 5760), (3744, 5620), (4160, 5058), (4215, 4992), (4496, 4680)]