21687120

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1$

素因数の和:370

約数の個数: 240

約数和(自身を含む): 89910912

約数和(自身を除く): 68223792

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 18, 20, 21, 24, 26, 28, 30, 35, 36, 39, 40, 42, 45, 48, 52, 56, 60, 63, 65, 70, 72, 78, 80, 84, 90, 91, 104, 105, 112, 117, 120, 126, 130, 140, 144, 156, 168, 180, 182, 195, 208, 210, 234, 240, 252, 260, 273, 280, 312, 315, 331, 336, 360, 364, 390, 420, 455, 468, 504, 520, 546, 560, 585, 624, 630, 662, 720, 728, 780, 819, 840, 910, 936, 993, 1008, 1040, 1092, 1170, 1260, 1324, 1365, 1456, 1560, 1638, 1655, 1680, 1820, 1872, 1986, 2184, 2317, 2340, 2520, 2648, 2730, 2979, 3120, 3276, 3310, 3640, 3972, 4095, 4303, 4368, 4634, 4680, 4965, 5040, 5296, 5460, 5958, 6552, 6620, 6951, 7280, 7944, 8190, 8606, 9268, 9360, 9930, 10920, 11585, 11916, 12909, 13104, 13240, 13902, 14895, 15888, 16380, 17212, 18536, 19860, 20853, 21515, 21840, 23170, 23832, 25818, 26480, 27804, 29790, 30121, 32760, 34424, 34755, 37072, 38727, 39720, 41706, 43030, 46340, 47664, 51636, 55608, 59580, 60242, 64545, 65520, 68848, 69510, 77454, 79440, 83412, 86060, 90363, 92680, 103272, 104265, 111216, 119160, 120484, 129090, 139020, 150605, 154908, 166824, 172120, 180726, 185360, 193635, 206544, 208530, 238320, 240968, 258180, 271089, 278040, 301210, 309816, 333648, 344240, 361452, 387270, 417060, 451815, 481936, 516360, 542178, 556080, 602420, 619632, 722904, 774540, 834120, 903630, 1032720, 1084356, 1204840, 1355445, 1445808, 1549080, 1668240, 1807260, 2168712, 2409680, 2710890, 3098160, 3614520, 4337424, 5421780, 7229040, 10843560, 21687120]

約数ペア:

[(1, 21687120), (2, 10843560), (3, 7229040), (4, 5421780), (5, 4337424), (6, 3614520), (7, 3098160), (8, 2710890), (9, 2409680), (10, 2168712), (12, 1807260), (13, 1668240), (14, 1549080), (15, 1445808), (16, 1355445), (18, 1204840), (20, 1084356), (21, 1032720), (24, 903630), (26, 834120), (28, 774540), (30, 722904), (35, 619632), (36, 602420), (39, 556080), (40, 542178), (42, 516360), (45, 481936), (48, 451815), (52, 417060), (56, 387270), (60, 361452), (63, 344240), (65, 333648), (70, 309816), (72, 301210), (78, 278040), (80, 271089), (84, 258180), (90, 240968), (91, 238320), (104, 208530), (105, 206544), (112, 193635), (117, 185360), (120, 180726), (126, 172120), (130, 166824), (140, 154908), (144, 150605), (156, 139020), (168, 129090), (180, 120484), (182, 119160), (195, 111216), (208, 104265), (210, 103272), (234, 92680), (240, 90363), (252, 86060), (260, 83412), (273, 79440), (280, 77454), (312, 69510), (315, 68848), (331, 65520), (336, 64545), (360, 60242), (364, 59580), (390, 55608), (420, 51636), (455, 47664), (468, 46340), (504, 43030), (520, 41706), (546, 39720), (560, 38727), (585, 37072), (624, 34755), (630, 34424), (662, 32760), (720, 30121), (728, 29790), (780, 27804), (819, 26480), (840, 25818), (910, 23832), (936, 23170), (993, 21840), (1008, 21515), (1040, 20853), (1092, 19860), (1170, 18536), (1260, 17212), (1324, 16380), (1365, 15888), (1456, 14895), (1560, 13902), (1638, 13240), (1655, 13104), (1680, 12909), (1820, 11916), (1872, 11585), (1986, 10920), (2184, 9930), (2317, 9360), (2340, 9268), (2520, 8606), (2648, 8190), (2730, 7944), (2979, 7280), (3120, 6951), (3276, 6620), (3310, 6552), (3640, 5958), (3972, 5460), (4095, 5296), (4303, 5040), (4368, 4965), (4634, 4680)]