21042560

素因数分解:

$2^7\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1$

素因数の和:105

約数の個数: 192

約数和(自身を含む): 64884240

約数和(自身を除く): 43841680

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 49, 55, 56, 61, 64, 70, 77, 80, 88, 98, 110, 112, 122, 128, 140, 154, 160, 176, 196, 220, 224, 244, 245, 280, 305, 308, 320, 352, 385, 392, 427, 440, 448, 488, 490, 539, 560, 610, 616, 640, 671, 704, 770, 784, 854, 880, 896, 976, 980, 1078, 1120, 1220, 1232, 1342, 1408, 1540, 1568, 1708, 1760, 1952, 1960, 2135, 2156, 2240, 2440, 2464, 2684, 2695, 2989, 3080, 3136, 3355, 3416, 3520, 3904, 3920, 4270, 4312, 4480, 4697, 4880, 4928, 5368, 5390, 5978, 6160, 6272, 6710, 6832, 7040, 7808, 7840, 8540, 8624, 9394, 9760, 9856, 10736, 10780, 11956, 12320, 13420, 13664, 14945, 15680, 17080, 17248, 18788, 19520, 21472, 21560, 23485, 23912, 24640, 26840, 27328, 29890, 31360, 32879, 34160, 34496, 37576, 39040, 42944, 43120, 46970, 47824, 49280, 53680, 54656, 59780, 65758, 68320, 68992, 75152, 85888, 86240, 93940, 95648, 107360, 119560, 131516, 136640, 150304, 164395, 172480, 187880, 191296, 214720, 239120, 263032, 273280, 300608, 328790, 344960, 375760, 382592, 429440, 478240, 526064, 601216, 657580, 751520, 956480, 1052128, 1315160, 1503040, 1912960, 2104256, 2630320, 3006080, 4208512, 5260640, 10521280, 21042560]

約数ペア:

[(1, 21042560), (2, 10521280), (4, 5260640), (5, 4208512), (7, 3006080), (8, 2630320), (10, 2104256), (11, 1912960), (14, 1503040), (16, 1315160), (20, 1052128), (22, 956480), (28, 751520), (32, 657580), (35, 601216), (40, 526064), (44, 478240), (49, 429440), (55, 382592), (56, 375760), (61, 344960), (64, 328790), (70, 300608), (77, 273280), (80, 263032), (88, 239120), (98, 214720), (110, 191296), (112, 187880), (122, 172480), (128, 164395), (140, 150304), (154, 136640), (160, 131516), (176, 119560), (196, 107360), (220, 95648), (224, 93940), (244, 86240), (245, 85888), (280, 75152), (305, 68992), (308, 68320), (320, 65758), (352, 59780), (385, 54656), (392, 53680), (427, 49280), (440, 47824), (448, 46970), (488, 43120), (490, 42944), (539, 39040), (560, 37576), (610, 34496), (616, 34160), (640, 32879), (671, 31360), (704, 29890), (770, 27328), (784, 26840), (854, 24640), (880, 23912), (896, 23485), (976, 21560), (980, 21472), (1078, 19520), (1120, 18788), (1220, 17248), (1232, 17080), (1342, 15680), (1408, 14945), (1540, 13664), (1568, 13420), (1708, 12320), (1760, 11956), (1952, 10780), (1960, 10736), (2135, 9856), (2156, 9760), (2240, 9394), (2440, 8624), (2464, 8540), (2684, 7840), (2695, 7808), (2989, 7040), (3080, 6832), (3136, 6710), (3355, 6272), (3416, 6160), (3520, 5978), (3904, 5390), (3920, 5368), (4270, 4928), (4312, 4880), (4480, 4697)]