81185720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{613}}^1$

素因数の和:685

約数の個数: 128

約数和(自身を含む): 233418240

約数和(自身を除く): 152232520

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 43, 44, 55, 56, 70, 77, 86, 88, 110, 140, 154, 172, 215, 220, 280, 301, 308, 344, 385, 430, 440, 473, 602, 613, 616, 770, 860, 946, 1204, 1226, 1505, 1540, 1720, 1892, 2365, 2408, 2452, 3010, 3065, 3080, 3311, 3784, 4291, 4730, 4904, 6020, 6130, 6622, 6743, 8582, 9460, 12040, 12260, 13244, 13486, 16555, 17164, 18920, 21455, 24520, 26359, 26488, 26972, 33110, 33715, 34328, 42910, 47201, 52718, 53944, 66220, 67430, 85820, 94402, 105436, 131795, 132440, 134860, 171640, 184513, 188804, 210872, 236005, 263590, 269720, 289949, 369026, 377608, 472010, 527180, 579898, 738052, 922565, 944020, 1054360, 1159796, 1449745, 1476104, 1845130, 1888040, 2029643, 2319592, 2899490, 3690260, 4059286, 5798980, 7380520, 8118572, 10148215, 11597960, 16237144, 20296430, 40592860, 81185720]

約数ペア:

[(1, 81185720), (2, 40592860), (4, 20296430), (5, 16237144), (7, 11597960), (8, 10148215), (10, 8118572), (11, 7380520), (14, 5798980), (20, 4059286), (22, 3690260), (28, 2899490), (35, 2319592), (40, 2029643), (43, 1888040), (44, 1845130), (55, 1476104), (56, 1449745), (70, 1159796), (77, 1054360), (86, 944020), (88, 922565), (110, 738052), (140, 579898), (154, 527180), (172, 472010), (215, 377608), (220, 369026), (280, 289949), (301, 269720), (308, 263590), (344, 236005), (385, 210872), (430, 188804), (440, 184513), (473, 171640), (602, 134860), (613, 132440), (616, 131795), (770, 105436), (860, 94402), (946, 85820), (1204, 67430), (1226, 66220), (1505, 53944), (1540, 52718), (1720, 47201), (1892, 42910), (2365, 34328), (2408, 33715), (2452, 33110), (3010, 26972), (3065, 26488), (3080, 26359), (3311, 24520), (3784, 21455), (4291, 18920), (4730, 17164), (4904, 16555), (6020, 13486), (6130, 13244), (6622, 12260), (6743, 12040), (8582, 9460)]