20689920

素因数分解:

$2^{10}\times 3^2\times 5^1\times {\mathrm{449}}^1$

素因数の和:480

約数の個数: 132

約数和(自身を含む): 71849700

約数和(自身を除く): 51159780

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 64, 72, 80, 90, 96, 120, 128, 144, 160, 180, 192, 240, 256, 288, 320, 360, 384, 449, 480, 512, 576, 640, 720, 768, 898, 960, 1024, 1152, 1280, 1347, 1440, 1536, 1796, 1920, 2245, 2304, 2560, 2694, 2880, 3072, 3592, 3840, 4041, 4490, 4608, 5120, 5388, 5760, 6735, 7184, 7680, 8082, 8980, 9216, 10776, 11520, 13470, 14368, 15360, 16164, 17960, 20205, 21552, 23040, 26940, 28736, 32328, 35920, 40410, 43104, 46080, 53880, 57472, 64656, 71840, 80820, 86208, 107760, 114944, 129312, 143680, 161640, 172416, 215520, 229888, 258624, 287360, 323280, 344832, 431040, 459776, 517248, 574720, 646560, 689664, 862080, 1034496, 1149440, 1293120, 1379328, 1724160, 2068992, 2298880, 2586240, 3448320, 4137984, 5172480, 6896640, 10344960, 20689920]

約数ペア:

[(1, 20689920), (2, 10344960), (3, 6896640), (4, 5172480), (5, 4137984), (6, 3448320), (8, 2586240), (9, 2298880), (10, 2068992), (12, 1724160), (15, 1379328), (16, 1293120), (18, 1149440), (20, 1034496), (24, 862080), (30, 689664), (32, 646560), (36, 574720), (40, 517248), (45, 459776), (48, 431040), (60, 344832), (64, 323280), (72, 287360), (80, 258624), (90, 229888), (96, 215520), (120, 172416), (128, 161640), (144, 143680), (160, 129312), (180, 114944), (192, 107760), (240, 86208), (256, 80820), (288, 71840), (320, 64656), (360, 57472), (384, 53880), (449, 46080), (480, 43104), (512, 40410), (576, 35920), (640, 32328), (720, 28736), (768, 26940), (898, 23040), (960, 21552), (1024, 20205), (1152, 17960), (1280, 16164), (1347, 15360), (1440, 14368), (1536, 13470), (1796, 11520), (1920, 10776), (2245, 9216), (2304, 8980), (2560, 8082), (2694, 7680), (2880, 7184), (3072, 6735), (3592, 5760), (3840, 5388), (4041, 5120), (4490, 4608)]