19907280

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:705

約数の個数: 120

約数和(自身を含む): 68516448

約数和(自身を除く): 48609168

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 43, 45, 48, 60, 72, 80, 86, 90, 120, 129, 144, 172, 180, 215, 240, 258, 344, 360, 387, 430, 516, 643, 645, 688, 720, 774, 860, 1032, 1286, 1290, 1548, 1720, 1929, 1935, 2064, 2572, 2580, 3096, 3215, 3440, 3858, 3870, 5144, 5160, 5787, 6192, 6430, 7716, 7740, 9645, 10288, 10320, 11574, 12860, 15432, 15480, 19290, 23148, 25720, 27649, 28935, 30864, 30960, 38580, 46296, 51440, 55298, 57870, 77160, 82947, 92592, 110596, 115740, 138245, 154320, 165894, 221192, 231480, 248841, 276490, 331788, 414735, 442384, 462960, 497682, 552980, 663576, 829470, 995364, 1105960, 1244205, 1327152, 1658940, 1990728, 2211920, 2488410, 3317880, 3981456, 4976820, 6635760, 9953640, 19907280]

約数ペア:

[(1, 19907280), (2, 9953640), (3, 6635760), (4, 4976820), (5, 3981456), (6, 3317880), (8, 2488410), (9, 2211920), (10, 1990728), (12, 1658940), (15, 1327152), (16, 1244205), (18, 1105960), (20, 995364), (24, 829470), (30, 663576), (36, 552980), (40, 497682), (43, 462960), (45, 442384), (48, 414735), (60, 331788), (72, 276490), (80, 248841), (86, 231480), (90, 221192), (120, 165894), (129, 154320), (144, 138245), (172, 115740), (180, 110596), (215, 92592), (240, 82947), (258, 77160), (344, 57870), (360, 55298), (387, 51440), (430, 46296), (516, 38580), (643, 30960), (645, 30864), (688, 28935), (720, 27649), (774, 25720), (860, 23148), (1032, 19290), (1286, 15480), (1290, 15432), (1548, 12860), (1720, 11574), (1929, 10320), (1935, 10288), (2064, 9645), (2572, 7740), (2580, 7716), (3096, 6430), (3215, 6192), (3440, 5787), (3858, 5160), (3870, 5144)]