20796160

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1$

素因数の和:250

約数の個数: 144

約数和(自身を含む): 62399232

約数和(自身を除く): 41603072

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, 110, 112, 128, 140, 154, 160, 176, 211, 220, 224, 256, 280, 308, 320, 352, 385, 422, 440, 448, 560, 616, 640, 704, 770, 844, 880, 896, 1055, 1120, 1232, 1280, 1408, 1477, 1540, 1688, 1760, 1792, 2110, 2240, 2321, 2464, 2816, 2954, 3080, 3376, 3520, 4220, 4480, 4642, 4928, 5908, 6160, 6752, 7040, 7385, 8440, 8960, 9284, 9856, 11605, 11816, 12320, 13504, 14080, 14770, 16247, 16880, 18568, 19712, 23210, 23632, 24640, 27008, 29540, 32494, 33760, 37136, 46420, 47264, 49280, 54016, 59080, 64988, 67520, 74272, 81235, 92840, 94528, 98560, 118160, 129976, 135040, 148544, 162470, 185680, 189056, 236320, 259952, 270080, 297088, 324940, 371360, 378112, 472640, 519904, 594176, 649880, 742720, 945280, 1039808, 1299760, 1485440, 1890560, 2079616, 2599520, 2970880, 4159232, 5199040, 10398080, 20796160]

約数ペア:

[(1, 20796160), (2, 10398080), (4, 5199040), (5, 4159232), (7, 2970880), (8, 2599520), (10, 2079616), (11, 1890560), (14, 1485440), (16, 1299760), (20, 1039808), (22, 945280), (28, 742720), (32, 649880), (35, 594176), (40, 519904), (44, 472640), (55, 378112), (56, 371360), (64, 324940), (70, 297088), (77, 270080), (80, 259952), (88, 236320), (110, 189056), (112, 185680), (128, 162470), (140, 148544), (154, 135040), (160, 129976), (176, 118160), (211, 98560), (220, 94528), (224, 92840), (256, 81235), (280, 74272), (308, 67520), (320, 64988), (352, 59080), (385, 54016), (422, 49280), (440, 47264), (448, 46420), (560, 37136), (616, 33760), (640, 32494), (704, 29540), (770, 27008), (844, 24640), (880, 23632), (896, 23210), (1055, 19712), (1120, 18568), (1232, 16880), (1280, 16247), (1408, 14770), (1477, 14080), (1540, 13504), (1688, 12320), (1760, 11816), (1792, 11605), (2110, 9856), (2240, 9284), (2321, 8960), (2464, 8440), (2816, 7385), (2954, 7040), (3080, 6752), (3376, 6160), (3520, 5908), (4220, 4928), (4480, 4642)]