256537680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{491}}^1$

素因数の和:825

約数の個数: 160

約数和(自身を含む): 913655808

約数和(自身を除く): 657118128

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, 105, 112, 120, 140, 168, 210, 240, 280, 311, 336, 420, 491, 560, 622, 840, 933, 982, 1244, 1473, 1555, 1680, 1866, 1964, 2177, 2455, 2488, 2946, 3110, 3437, 3732, 3928, 4354, 4665, 4910, 4976, 5892, 6220, 6531, 6874, 7365, 7464, 7856, 8708, 9330, 9820, 10311, 10885, 11784, 12440, 13062, 13748, 14730, 14928, 17185, 17416, 18660, 19640, 20622, 21770, 23568, 24880, 26124, 27496, 29460, 32655, 34370, 34832, 37320, 39280, 41244, 43540, 51555, 52248, 54992, 58920, 65310, 68740, 74640, 82488, 87080, 103110, 104496, 117840, 130620, 137480, 152701, 164976, 174160, 206220, 261240, 274960, 305402, 412440, 458103, 522480, 610804, 763505, 824880, 916206, 1068907, 1221608, 1527010, 1832412, 2137814, 2290515, 2443216, 3054020, 3206721, 3664824, 4275628, 4581030, 5344535, 6108040, 6413442, 7329648, 8551256, 9162060, 10689070, 12216080, 12826884, 16033605, 17102512, 18324120, 21378140, 25653768, 32067210, 36648240, 42756280, 51307536, 64134420, 85512560, 128268840, 256537680]

約数ペア:

[(1, 256537680), (2, 128268840), (3, 85512560), (4, 64134420), (5, 51307536), (6, 42756280), (7, 36648240), (8, 32067210), (10, 25653768), (12, 21378140), (14, 18324120), (15, 17102512), (16, 16033605), (20, 12826884), (21, 12216080), (24, 10689070), (28, 9162060), (30, 8551256), (35, 7329648), (40, 6413442), (42, 6108040), (48, 5344535), (56, 4581030), (60, 4275628), (70, 3664824), (80, 3206721), (84, 3054020), (105, 2443216), (112, 2290515), (120, 2137814), (140, 1832412), (168, 1527010), (210, 1221608), (240, 1068907), (280, 916206), (311, 824880), (336, 763505), (420, 610804), (491, 522480), (560, 458103), (622, 412440), (840, 305402), (933, 274960), (982, 261240), (1244, 206220), (1473, 174160), (1555, 164976), (1680, 152701), (1866, 137480), (1964, 130620), (2177, 117840), (2455, 104496), (2488, 103110), (2946, 87080), (3110, 82488), (3437, 74640), (3732, 68740), (3928, 65310), (4354, 58920), (4665, 54992), (4910, 52248), (4976, 51555), (5892, 43540), (6220, 41244), (6531, 39280), (6874, 37320), (7365, 34832), (7464, 34370), (7856, 32655), (8708, 29460), (9330, 27496), (9820, 26124), (10311, 24880), (10885, 23568), (11784, 21770), (12440, 20622), (13062, 19640), (13748, 18660), (14730, 17416), (14928, 17185)]