257207280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{521}}^1$

素因数の和:576

約数の個数: 240

約数和(自身を含む): 929752992

約数和(自身を除く): 672545712

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 17, 20, 22, 24, 30, 33, 34, 40, 44, 48, 51, 55, 60, 66, 68, 80, 85, 88, 102, 110, 120, 121, 132, 136, 165, 170, 176, 187, 204, 220, 240, 242, 255, 264, 272, 330, 340, 363, 374, 408, 440, 484, 510, 521, 528, 561, 605, 660, 680, 726, 748, 816, 880, 935, 968, 1020, 1042, 1122, 1210, 1320, 1360, 1452, 1496, 1563, 1815, 1870, 1936, 2040, 2057, 2084, 2244, 2420, 2605, 2640, 2805, 2904, 2992, 3126, 3630, 3740, 4080, 4114, 4168, 4488, 4840, 5210, 5610, 5731, 5808, 6171, 6252, 7260, 7480, 7815, 8228, 8336, 8857, 8976, 9680, 10285, 10420, 11220, 11462, 12342, 12504, 14520, 14960, 15630, 16456, 17193, 17714, 20570, 20840, 22440, 22924, 24684, 25008, 26571, 28655, 29040, 30855, 31260, 32912, 34386, 35428, 41140, 41680, 44285, 44880, 45848, 49368, 53142, 57310, 61710, 62520, 63041, 68772, 70856, 82280, 85965, 88570, 91696, 97427, 98736, 106284, 114620, 123420, 125040, 126082, 132855, 137544, 141712, 164560, 171930, 177140, 189123, 194854, 212568, 229240, 246840, 252164, 265710, 275088, 292281, 315205, 343860, 354280, 378246, 389708, 425136, 458480, 487135, 493680, 504328, 531420, 584562, 630410, 687720, 708560, 756492, 779416, 945615, 974270, 1008656, 1062840, 1071697, 1169124, 1260820, 1375440, 1461405, 1512984, 1558832, 1891230, 1948540, 2125680, 2143394, 2338248, 2521640, 2922810, 3025968, 3215091, 3782460, 3897080, 4286788, 4676496, 5043280, 5358485, 5845620, 6430182, 7564920, 7794160, 8573576, 10716970, 11691240, 12860364, 15129840, 16075455, 17147152, 21433940, 23382480, 25720728, 32150910, 42867880, 51441456, 64301820, 85735760, 128603640, 257207280]

約数ペア:

[(1, 257207280), (2, 128603640), (3, 85735760), (4, 64301820), (5, 51441456), (6, 42867880), (8, 32150910), (10, 25720728), (11, 23382480), (12, 21433940), (15, 17147152), (16, 16075455), (17, 15129840), (20, 12860364), (22, 11691240), (24, 10716970), (30, 8573576), (33, 7794160), (34, 7564920), (40, 6430182), (44, 5845620), (48, 5358485), (51, 5043280), (55, 4676496), (60, 4286788), (66, 3897080), (68, 3782460), (80, 3215091), (85, 3025968), (88, 2922810), (102, 2521640), (110, 2338248), (120, 2143394), (121, 2125680), (132, 1948540), (136, 1891230), (165, 1558832), (170, 1512984), (176, 1461405), (187, 1375440), (204, 1260820), (220, 1169124), (240, 1071697), (242, 1062840), (255, 1008656), (264, 974270), (272, 945615), (330, 779416), (340, 756492), (363, 708560), (374, 687720), (408, 630410), (440, 584562), (484, 531420), (510, 504328), (521, 493680), (528, 487135), (561, 458480), (605, 425136), (660, 389708), (680, 378246), (726, 354280), (748, 343860), (816, 315205), (880, 292281), (935, 275088), (968, 265710), (1020, 252164), (1042, 246840), (1122, 229240), (1210, 212568), (1320, 194854), (1360, 189123), (1452, 177140), (1496, 171930), (1563, 164560), (1815, 141712), (1870, 137544), (1936, 132855), (2040, 126082), (2057, 125040), (2084, 123420), (2244, 114620), (2420, 106284), (2605, 98736), (2640, 97427), (2805, 91696), (2904, 88570), (2992, 85965), (3126, 82280), (3630, 70856), (3740, 68772), (4080, 63041), (4114, 62520), (4168, 61710), (4488, 57310), (4840, 53142), (5210, 49368), (5610, 45848), (5731, 44880), (5808, 44285), (6171, 41680), (6252, 41140), (7260, 35428), (7480, 34386), (7815, 32912), (8228, 31260), (8336, 30855), (8857, 29040), (8976, 28655), (9680, 26571), (10285, 25008), (10420, 24684), (11220, 22924), (11462, 22440), (12342, 20840), (12504, 20570), (14520, 17714), (14960, 17193), (15630, 16456)]