257246720

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:320

約数の個数: 160

約数和(自身を含む): 684116928

約数和(自身を除く): 426870208

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 32, 34, 40, 46, 64, 68, 80, 85, 92, 115, 128, 136, 160, 170, 184, 230, 256, 257, 272, 320, 340, 368, 391, 460, 512, 514, 544, 640, 680, 736, 782, 920, 1028, 1088, 1280, 1285, 1360, 1472, 1564, 1840, 1955, 2056, 2176, 2560, 2570, 2720, 2944, 3128, 3680, 3910, 4112, 4352, 4369, 5140, 5440, 5888, 5911, 6256, 7360, 7820, 8224, 8704, 8738, 10280, 10880, 11776, 11822, 12512, 14720, 15640, 16448, 17476, 20560, 21760, 21845, 23644, 25024, 29440, 29555, 31280, 32896, 34952, 41120, 43520, 43690, 47288, 50048, 58880, 59110, 62560, 65792, 69904, 82240, 87380, 94576, 100096, 100487, 118220, 125120, 131584, 139808, 164480, 174760, 189152, 200192, 200974, 236440, 250240, 279616, 328960, 349520, 378304, 401948, 472880, 500480, 502435, 559232, 657920, 699040, 756608, 803896, 945760, 1000960, 1004870, 1118464, 1398080, 1513216, 1607792, 1891520, 2009740, 2236928, 2796160, 3026432, 3215584, 3783040, 4019480, 5592320, 6431168, 7566080, 8038960, 11184640, 12862336, 15132160, 16077920, 25724672, 32155840, 51449344, 64311680, 128623360, 257246720]

約数ペア:

[(1, 257246720), (2, 128623360), (4, 64311680), (5, 51449344), (8, 32155840), (10, 25724672), (16, 16077920), (17, 15132160), (20, 12862336), (23, 11184640), (32, 8038960), (34, 7566080), (40, 6431168), (46, 5592320), (64, 4019480), (68, 3783040), (80, 3215584), (85, 3026432), (92, 2796160), (115, 2236928), (128, 2009740), (136, 1891520), (160, 1607792), (170, 1513216), (184, 1398080), (230, 1118464), (256, 1004870), (257, 1000960), (272, 945760), (320, 803896), (340, 756608), (368, 699040), (391, 657920), (460, 559232), (512, 502435), (514, 500480), (544, 472880), (640, 401948), (680, 378304), (736, 349520), (782, 328960), (920, 279616), (1028, 250240), (1088, 236440), (1280, 200974), (1285, 200192), (1360, 189152), (1472, 174760), (1564, 164480), (1840, 139808), (1955, 131584), (2056, 125120), (2176, 118220), (2560, 100487), (2570, 100096), (2720, 94576), (2944, 87380), (3128, 82240), (3680, 69904), (3910, 65792), (4112, 62560), (4352, 59110), (4369, 58880), (5140, 50048), (5440, 47288), (5888, 43690), (5911, 43520), (6256, 41120), (7360, 34952), (7820, 32896), (8224, 31280), (8704, 29555), (8738, 29440), (10280, 25024), (10880, 23644), (11776, 21845), (11822, 21760), (12512, 20560), (14720, 17476), (15640, 16448)]