19989760

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1$

素因数の和:148

約数の個数: 144

約数和(自身を含む): 57689856

約数和(自身を除く): 37700096

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 32, 35, 40, 46, 56, 64, 70, 80, 92, 97, 112, 115, 128, 140, 160, 161, 184, 194, 224, 230, 256, 280, 320, 322, 368, 388, 448, 460, 485, 560, 640, 644, 679, 736, 776, 805, 896, 920, 970, 1120, 1280, 1288, 1358, 1472, 1552, 1610, 1792, 1840, 1940, 2231, 2240, 2576, 2716, 2944, 3104, 3220, 3395, 3680, 3880, 4462, 4480, 5152, 5432, 5888, 6208, 6440, 6790, 7360, 7760, 8924, 8960, 10304, 10864, 11155, 12416, 12880, 13580, 14720, 15520, 15617, 17848, 20608, 21728, 22310, 24832, 25760, 27160, 29440, 31040, 31234, 35696, 41216, 43456, 44620, 51520, 54320, 62080, 62468, 71392, 78085, 86912, 89240, 103040, 108640, 124160, 124936, 142784, 156170, 173824, 178480, 206080, 217280, 249872, 285568, 312340, 356960, 434560, 499744, 571136, 624680, 713920, 869120, 999488, 1249360, 1427840, 1998976, 2498720, 2855680, 3997952, 4997440, 9994880, 19989760]

約数ペア:

[(1, 19989760), (2, 9994880), (4, 4997440), (5, 3997952), (7, 2855680), (8, 2498720), (10, 1998976), (14, 1427840), (16, 1249360), (20, 999488), (23, 869120), (28, 713920), (32, 624680), (35, 571136), (40, 499744), (46, 434560), (56, 356960), (64, 312340), (70, 285568), (80, 249872), (92, 217280), (97, 206080), (112, 178480), (115, 173824), (128, 156170), (140, 142784), (160, 124936), (161, 124160), (184, 108640), (194, 103040), (224, 89240), (230, 86912), (256, 78085), (280, 71392), (320, 62468), (322, 62080), (368, 54320), (388, 51520), (448, 44620), (460, 43456), (485, 41216), (560, 35696), (640, 31234), (644, 31040), (679, 29440), (736, 27160), (776, 25760), (805, 24832), (896, 22310), (920, 21728), (970, 20608), (1120, 17848), (1280, 15617), (1288, 15520), (1358, 14720), (1472, 13580), (1552, 12880), (1610, 12416), (1792, 11155), (1840, 10864), (1940, 10304), (2231, 8960), (2240, 8924), (2576, 7760), (2716, 7360), (2944, 6790), (3104, 6440), (3220, 6208), (3395, 5888), (3680, 5432), (3880, 5152), (4462, 4480)]