640421376

素因数分解:

$2^9\times 3^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{127}}^1$

素因数の和:229

約数の個数: 240

約数和(自身を含む): 2030155776

約数和(自身を除く): 1389734400

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 49, 56, 64, 67, 84, 96, 98, 112, 127, 128, 134, 147, 168, 192, 196, 201, 224, 254, 256, 268, 294, 336, 381, 384, 392, 402, 448, 469, 508, 512, 536, 588, 672, 762, 768, 784, 804, 889, 896, 938, 1016, 1072, 1176, 1344, 1407, 1524, 1536, 1568, 1608, 1778, 1792, 1876, 2032, 2144, 2352, 2667, 2688, 2814, 3048, 3136, 3216, 3283, 3556, 3584, 3752, 4064, 4288, 4704, 5334, 5376, 5628, 6096, 6223, 6272, 6432, 6566, 7112, 7504, 8128, 8509, 8576, 9408, 9849, 10668, 10752, 11256, 12192, 12446, 12544, 12864, 13132, 14224, 15008, 16256, 17018, 17152, 18669, 18816, 19698, 21336, 22512, 24384, 24892, 25088, 25527, 25728, 26264, 28448, 30016, 32512, 34036, 34304, 37338, 37632, 39396, 42672, 45024, 48768, 49784, 51054, 51456, 52528, 56896, 59563, 60032, 65024, 68072, 74676, 75264, 78792, 85344, 90048, 97536, 99568, 102108, 102912, 105056, 113792, 119126, 120064, 136144, 149352, 157584, 170688, 178689, 180096, 195072, 199136, 204216, 210112, 227584, 238252, 240128, 272288, 298704, 315168, 341376, 357378, 360192, 398272, 408432, 416941, 420224, 455168, 476504, 544576, 597408, 630336, 682752, 714756, 720384, 796544, 816864, 833882, 840448, 953008, 1089152, 1194816, 1250823, 1260672, 1365504, 1429512, 1593088, 1633728, 1667764, 1680896, 1906016, 2178304, 2389632, 2501646, 2521344, 2859024, 3186176, 3267456, 3335528, 3812032, 4356608, 4779264, 5003292, 5042688, 5718048, 6534912, 6671056, 7624064, 9558528, 10006584, 11436096, 13069824, 13342112, 15248128, 20013168, 22872192, 26684224, 30496256, 40026336, 45744384, 53368448, 80052672, 91488768, 106736896, 160105344, 213473792, 320210688, 640421376]

約数ペア:

[(1, 640421376), (2, 320210688), (3, 213473792), (4, 160105344), (6, 106736896), (7, 91488768), (8, 80052672), (12, 53368448), (14, 45744384), (16, 40026336), (21, 30496256), (24, 26684224), (28, 22872192), (32, 20013168), (42, 15248128), (48, 13342112), (49, 13069824), (56, 11436096), (64, 10006584), (67, 9558528), (84, 7624064), (96, 6671056), (98, 6534912), (112, 5718048), (127, 5042688), (128, 5003292), (134, 4779264), (147, 4356608), (168, 3812032), (192, 3335528), (196, 3267456), (201, 3186176), (224, 2859024), (254, 2521344), (256, 2501646), (268, 2389632), (294, 2178304), (336, 1906016), (381, 1680896), (384, 1667764), (392, 1633728), (402, 1593088), (448, 1429512), (469, 1365504), (508, 1260672), (512, 1250823), (536, 1194816), (588, 1089152), (672, 953008), (762, 840448), (768, 833882), (784, 816864), (804, 796544), (889, 720384), (896, 714756), (938, 682752), (1016, 630336), (1072, 597408), (1176, 544576), (1344, 476504), (1407, 455168), (1524, 420224), (1536, 416941), (1568, 408432), (1608, 398272), (1778, 360192), (1792, 357378), (1876, 341376), (2032, 315168), (2144, 298704), (2352, 272288), (2667, 240128), (2688, 238252), (2814, 227584), (3048, 210112), (3136, 204216), (3216, 199136), (3283, 195072), (3556, 180096), (3584, 178689), (3752, 170688), (4064, 157584), (4288, 149352), (4704, 136144), (5334, 120064), (5376, 119126), (5628, 113792), (6096, 105056), (6223, 102912), (6272, 102108), (6432, 99568), (6566, 97536), (7112, 90048), (7504, 85344), (8128, 78792), (8509, 75264), (8576, 74676), (9408, 68072), (9849, 65024), (10668, 60032), (10752, 59563), (11256, 56896), (12192, 52528), (12446, 51456), (12544, 51054), (12864, 49784), (13132, 48768), (14224, 45024), (15008, 42672), (16256, 39396), (17018, 37632), (17152, 37338), (18669, 34304), (18816, 34036), (19698, 32512), (21336, 30016), (22512, 28448), (24384, 26264), (24892, 25728), (25088, 25527)]