21181440

素因数分解:

$2^{10}\times 3^1\times 5^1\times 7^1\times {\mathrm{197}}^1$

素因数の和:232

約数の個数: 176

約数和(自身を含む): 77818752

約数和(自身を除く): 56637312

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 56, 60, 64, 70, 80, 84, 96, 105, 112, 120, 128, 140, 160, 168, 192, 197, 210, 224, 240, 256, 280, 320, 336, 384, 394, 420, 448, 480, 512, 560, 591, 640, 672, 768, 788, 840, 896, 960, 985, 1024, 1120, 1182, 1280, 1344, 1379, 1536, 1576, 1680, 1792, 1920, 1970, 2240, 2364, 2560, 2688, 2758, 2955, 3072, 3152, 3360, 3584, 3840, 3940, 4137, 4480, 4728, 5120, 5376, 5516, 5910, 6304, 6720, 6895, 7168, 7680, 7880, 8274, 8960, 9456, 10752, 11032, 11820, 12608, 13440, 13790, 15360, 15760, 16548, 17920, 18912, 20685, 21504, 22064, 23640, 25216, 26880, 27580, 31520, 33096, 35840, 37824, 41370, 44128, 47280, 50432, 53760, 55160, 63040, 66192, 75648, 82740, 88256, 94560, 100864, 107520, 110320, 126080, 132384, 151296, 165480, 176512, 189120, 201728, 220640, 252160, 264768, 302592, 330960, 353024, 378240, 441280, 504320, 529536, 605184, 661920, 706048, 756480, 882560, 1008640, 1059072, 1323840, 1412096, 1512960, 1765120, 2118144, 2647680, 3025920, 3530240, 4236288, 5295360, 7060480, 10590720, 21181440]

約数ペア:

[(1, 21181440), (2, 10590720), (3, 7060480), (4, 5295360), (5, 4236288), (6, 3530240), (7, 3025920), (8, 2647680), (10, 2118144), (12, 1765120), (14, 1512960), (15, 1412096), (16, 1323840), (20, 1059072), (21, 1008640), (24, 882560), (28, 756480), (30, 706048), (32, 661920), (35, 605184), (40, 529536), (42, 504320), (48, 441280), (56, 378240), (60, 353024), (64, 330960), (70, 302592), (80, 264768), (84, 252160), (96, 220640), (105, 201728), (112, 189120), (120, 176512), (128, 165480), (140, 151296), (160, 132384), (168, 126080), (192, 110320), (197, 107520), (210, 100864), (224, 94560), (240, 88256), (256, 82740), (280, 75648), (320, 66192), (336, 63040), (384, 55160), (394, 53760), (420, 50432), (448, 47280), (480, 44128), (512, 41370), (560, 37824), (591, 35840), (640, 33096), (672, 31520), (768, 27580), (788, 26880), (840, 25216), (896, 23640), (960, 22064), (985, 21504), (1024, 20685), (1120, 18912), (1182, 17920), (1280, 16548), (1344, 15760), (1379, 15360), (1536, 13790), (1576, 13440), (1680, 12608), (1792, 11820), (1920, 11032), (1970, 10752), (2240, 9456), (2364, 8960), (2560, 8274), (2688, 7880), (2758, 7680), (2955, 7168), (3072, 6895), (3152, 6720), (3360, 6304), (3584, 5910), (3840, 5516), (3940, 5376), (4137, 5120), (4480, 4728)]