19909120

素因数分解:

$2^9\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1$

素因数の和:142

約数の個数: 160

約数和(自身を含む): 60103296

約数和(自身を除く): 40194176

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 32, 35, 40, 44, 55, 56, 64, 70, 77, 80, 88, 101, 110, 112, 128, 140, 154, 160, 176, 202, 220, 224, 256, 280, 308, 320, 352, 385, 404, 440, 448, 505, 512, 560, 616, 640, 704, 707, 770, 808, 880, 896, 1010, 1111, 1120, 1232, 1280, 1408, 1414, 1540, 1616, 1760, 1792, 2020, 2222, 2240, 2464, 2560, 2816, 2828, 3080, 3232, 3520, 3535, 3584, 4040, 4444, 4480, 4928, 5555, 5632, 5656, 6160, 6464, 7040, 7070, 7777, 8080, 8888, 8960, 9856, 11110, 11312, 12320, 12928, 14080, 14140, 15554, 16160, 17776, 17920, 19712, 22220, 22624, 24640, 25856, 28160, 28280, 31108, 32320, 35552, 38885, 39424, 44440, 45248, 49280, 51712, 56560, 62216, 64640, 71104, 77770, 88880, 90496, 98560, 113120, 124432, 129280, 142208, 155540, 177760, 180992, 197120, 226240, 248864, 258560, 284416, 311080, 355520, 361984, 452480, 497728, 568832, 622160, 711040, 904960, 995456, 1244320, 1422080, 1809920, 1990912, 2488640, 2844160, 3981824, 4977280, 9954560, 19909120]

約数ペア:

[(1, 19909120), (2, 9954560), (4, 4977280), (5, 3981824), (7, 2844160), (8, 2488640), (10, 1990912), (11, 1809920), (14, 1422080), (16, 1244320), (20, 995456), (22, 904960), (28, 711040), (32, 622160), (35, 568832), (40, 497728), (44, 452480), (55, 361984), (56, 355520), (64, 311080), (70, 284416), (77, 258560), (80, 248864), (88, 226240), (101, 197120), (110, 180992), (112, 177760), (128, 155540), (140, 142208), (154, 129280), (160, 124432), (176, 113120), (202, 98560), (220, 90496), (224, 88880), (256, 77770), (280, 71104), (308, 64640), (320, 62216), (352, 56560), (385, 51712), (404, 49280), (440, 45248), (448, 44440), (505, 39424), (512, 38885), (560, 35552), (616, 32320), (640, 31108), (704, 28280), (707, 28160), (770, 25856), (808, 24640), (880, 22624), (896, 22220), (1010, 19712), (1111, 17920), (1120, 17776), (1232, 16160), (1280, 15554), (1408, 14140), (1414, 14080), (1540, 12928), (1616, 12320), (1760, 11312), (1792, 11110), (2020, 9856), (2222, 8960), (2240, 8888), (2464, 8080), (2560, 7777), (2816, 7070), (2828, 7040), (3080, 6464), (3232, 6160), (3520, 5656), (3535, 5632), (3584, 5555), (4040, 4928), (4444, 4480)]