21045920

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1$

素因数の和:107

約数の個数: 192

約数和(自身を含む): 63866880

約数和(自身を除く): 42820960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 23, 28, 32, 35, 38, 40, 43, 46, 56, 70, 76, 80, 86, 92, 95, 112, 115, 133, 140, 152, 160, 161, 172, 184, 190, 215, 224, 230, 266, 280, 301, 304, 322, 344, 368, 380, 430, 437, 460, 532, 560, 602, 608, 644, 665, 688, 736, 760, 805, 817, 860, 874, 920, 989, 1064, 1120, 1204, 1288, 1330, 1376, 1505, 1520, 1610, 1634, 1720, 1748, 1840, 1978, 2128, 2185, 2408, 2576, 2660, 3010, 3040, 3059, 3220, 3268, 3440, 3496, 3680, 3956, 4085, 4256, 4370, 4816, 4945, 5152, 5320, 5719, 6020, 6118, 6440, 6536, 6880, 6923, 6992, 7912, 8170, 8740, 9632, 9890, 10640, 11438, 12040, 12236, 12880, 13072, 13846, 13984, 15295, 15824, 16340, 17480, 18791, 19780, 21280, 22876, 24080, 24472, 25760, 26144, 27692, 28595, 30590, 31648, 32680, 34615, 34960, 37582, 39560, 45752, 48160, 48944, 55384, 57190, 61180, 65360, 69230, 69920, 75164, 79120, 91504, 93955, 97888, 110768, 114380, 122360, 130720, 131537, 138460, 150328, 158240, 183008, 187910, 221536, 228760, 244720, 263074, 276920, 300656, 375820, 457520, 489440, 526148, 553840, 601312, 657685, 751640, 915040, 1052296, 1107680, 1315370, 1503280, 2104592, 2630740, 3006560, 4209184, 5261480, 10522960, 21045920]

約数ペア:

[(1, 21045920), (2, 10522960), (4, 5261480), (5, 4209184), (7, 3006560), (8, 2630740), (10, 2104592), (14, 1503280), (16, 1315370), (19, 1107680), (20, 1052296), (23, 915040), (28, 751640), (32, 657685), (35, 601312), (38, 553840), (40, 526148), (43, 489440), (46, 457520), (56, 375820), (70, 300656), (76, 276920), (80, 263074), (86, 244720), (92, 228760), (95, 221536), (112, 187910), (115, 183008), (133, 158240), (140, 150328), (152, 138460), (160, 131537), (161, 130720), (172, 122360), (184, 114380), (190, 110768), (215, 97888), (224, 93955), (230, 91504), (266, 79120), (280, 75164), (301, 69920), (304, 69230), (322, 65360), (344, 61180), (368, 57190), (380, 55384), (430, 48944), (437, 48160), (460, 45752), (532, 39560), (560, 37582), (602, 34960), (608, 34615), (644, 32680), (665, 31648), (688, 30590), (736, 28595), (760, 27692), (805, 26144), (817, 25760), (860, 24472), (874, 24080), (920, 22876), (989, 21280), (1064, 19780), (1120, 18791), (1204, 17480), (1288, 16340), (1330, 15824), (1376, 15295), (1505, 13984), (1520, 13846), (1610, 13072), (1634, 12880), (1720, 12236), (1748, 12040), (1840, 11438), (1978, 10640), (2128, 9890), (2185, 9632), (2408, 8740), (2576, 8170), (2660, 7912), (3010, 6992), (3040, 6923), (3059, 6880), (3220, 6536), (3268, 6440), (3440, 6118), (3496, 6020), (3680, 5719), (3956, 5320), (4085, 5152), (4256, 4945), (4370, 4816)]