20484240

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:249

約数の個数: 160

約数和(自身を含む): 73923840

約数和(自身を除く): 53439600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 89, 105, 112, 120, 137, 140, 168, 178, 210, 240, 267, 274, 280, 336, 356, 411, 420, 445, 534, 548, 560, 623, 685, 712, 822, 840, 890, 959, 1068, 1096, 1246, 1335, 1370, 1424, 1644, 1680, 1780, 1869, 1918, 2055, 2136, 2192, 2492, 2670, 2740, 2877, 3115, 3288, 3560, 3738, 3836, 4110, 4272, 4795, 4984, 5340, 5480, 5754, 6230, 6576, 7120, 7476, 7672, 8220, 9345, 9590, 9968, 10680, 10960, 11508, 12193, 12460, 14385, 14952, 15344, 16440, 18690, 19180, 21360, 23016, 24386, 24920, 28770, 29904, 32880, 36579, 37380, 38360, 46032, 48772, 49840, 57540, 60965, 73158, 74760, 76720, 85351, 97544, 115080, 121930, 146316, 149520, 170702, 182895, 195088, 230160, 243860, 256053, 292632, 341404, 365790, 426755, 487720, 512106, 585264, 682808, 731580, 853510, 975440, 1024212, 1280265, 1365616, 1463160, 1707020, 2048424, 2560530, 2926320, 3414040, 4096848, 5121060, 6828080, 10242120, 20484240]

約数ペア:

[(1, 20484240), (2, 10242120), (3, 6828080), (4, 5121060), (5, 4096848), (6, 3414040), (7, 2926320), (8, 2560530), (10, 2048424), (12, 1707020), (14, 1463160), (15, 1365616), (16, 1280265), (20, 1024212), (21, 975440), (24, 853510), (28, 731580), (30, 682808), (35, 585264), (40, 512106), (42, 487720), (48, 426755), (56, 365790), (60, 341404), (70, 292632), (80, 256053), (84, 243860), (89, 230160), (105, 195088), (112, 182895), (120, 170702), (137, 149520), (140, 146316), (168, 121930), (178, 115080), (210, 97544), (240, 85351), (267, 76720), (274, 74760), (280, 73158), (336, 60965), (356, 57540), (411, 49840), (420, 48772), (445, 46032), (534, 38360), (548, 37380), (560, 36579), (623, 32880), (685, 29904), (712, 28770), (822, 24920), (840, 24386), (890, 23016), (959, 21360), (1068, 19180), (1096, 18690), (1246, 16440), (1335, 15344), (1370, 14952), (1424, 14385), (1644, 12460), (1680, 12193), (1780, 11508), (1869, 10960), (1918, 10680), (2055, 9968), (2136, 9590), (2192, 9345), (2492, 8220), (2670, 7672), (2740, 7476), (2877, 7120), (3115, 6576), (3288, 6230), (3560, 5754), (3738, 5480), (3836, 5340), (4110, 4984), (4272, 4795)]