19989120

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{359}}^1$

素因数の和:410

約数の個数: 128

約数和(自身を含む): 66096000

約数和(自身を除く): 46106880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 29, 30, 32, 40, 48, 58, 60, 64, 80, 87, 96, 116, 120, 128, 145, 160, 174, 192, 232, 240, 290, 320, 348, 359, 384, 435, 464, 480, 580, 640, 696, 718, 870, 928, 960, 1077, 1160, 1392, 1436, 1740, 1795, 1856, 1920, 2154, 2320, 2784, 2872, 3480, 3590, 3712, 4308, 4640, 5385, 5568, 5744, 6960, 7180, 8616, 9280, 10411, 10770, 11136, 11488, 13920, 14360, 17232, 18560, 20822, 21540, 22976, 27840, 28720, 31233, 34464, 41644, 43080, 45952, 52055, 55680, 57440, 62466, 68928, 83288, 86160, 104110, 114880, 124932, 137856, 156165, 166576, 172320, 208220, 229760, 249864, 312330, 333152, 344640, 416440, 499728, 624660, 666304, 689280, 832880, 999456, 1249320, 1332608, 1665760, 1998912, 2498640, 3331520, 3997824, 4997280, 6663040, 9994560, 19989120]

約数ペア:

[(1, 19989120), (2, 9994560), (3, 6663040), (4, 4997280), (5, 3997824), (6, 3331520), (8, 2498640), (10, 1998912), (12, 1665760), (15, 1332608), (16, 1249320), (20, 999456), (24, 832880), (29, 689280), (30, 666304), (32, 624660), (40, 499728), (48, 416440), (58, 344640), (60, 333152), (64, 312330), (80, 249864), (87, 229760), (96, 208220), (116, 172320), (120, 166576), (128, 156165), (145, 137856), (160, 124932), (174, 114880), (192, 104110), (232, 86160), (240, 83288), (290, 68928), (320, 62466), (348, 57440), (359, 55680), (384, 52055), (435, 45952), (464, 43080), (480, 41644), (580, 34464), (640, 31233), (696, 28720), (718, 27840), (870, 22976), (928, 21540), (960, 20822), (1077, 18560), (1160, 17232), (1392, 14360), (1436, 13920), (1740, 11488), (1795, 11136), (1856, 10770), (1920, 10411), (2154, 9280), (2320, 8616), (2784, 7180), (2872, 6960), (3480, 5744), (3590, 5568), (3712, 5385), (4308, 4640)]