81438560

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:173

約数の個数: 192

約数和(自身を含む): 239500800

約数和(自身を除く): 158062240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 19, 20, 28, 32, 35, 38, 40, 43, 56, 70, 76, 80, 86, 89, 95, 112, 133, 140, 152, 160, 172, 178, 190, 215, 224, 266, 280, 301, 304, 344, 356, 380, 430, 445, 532, 560, 602, 608, 623, 665, 688, 712, 760, 817, 860, 890, 1064, 1120, 1204, 1246, 1330, 1376, 1424, 1505, 1520, 1634, 1691, 1720, 1780, 2128, 2408, 2492, 2660, 2848, 3010, 3040, 3115, 3268, 3382, 3440, 3560, 3827, 4085, 4256, 4816, 4984, 5320, 5719, 6020, 6230, 6536, 6764, 6880, 7120, 7654, 8170, 8455, 9632, 9968, 10640, 11438, 11837, 12040, 12460, 13072, 13528, 14240, 15308, 16340, 16910, 19135, 19936, 21280, 22876, 23674, 24080, 24920, 26144, 26789, 27056, 28595, 30616, 32680, 33820, 38270, 45752, 47348, 48160, 49840, 53578, 54112, 57190, 59185, 61232, 65360, 67640, 72713, 76540, 91504, 94696, 99680, 107156, 114380, 118370, 122464, 130720, 133945, 135280, 145426, 153080, 183008, 189392, 214312, 228760, 236740, 267890, 270560, 290852, 306160, 363565, 378784, 428624, 457520, 473480, 508991, 535780, 581704, 612320, 727130, 857248, 915040, 946960, 1017982, 1071560, 1163408, 1454260, 1893920, 2035964, 2143120, 2326816, 2544955, 2908520, 4071928, 4286240, 5089910, 5817040, 8143856, 10179820, 11634080, 16287712, 20359640, 40719280, 81438560]

約数ペア:

[(1, 81438560), (2, 40719280), (4, 20359640), (5, 16287712), (7, 11634080), (8, 10179820), (10, 8143856), (14, 5817040), (16, 5089910), (19, 4286240), (20, 4071928), (28, 2908520), (32, 2544955), (35, 2326816), (38, 2143120), (40, 2035964), (43, 1893920), (56, 1454260), (70, 1163408), (76, 1071560), (80, 1017982), (86, 946960), (89, 915040), (95, 857248), (112, 727130), (133, 612320), (140, 581704), (152, 535780), (160, 508991), (172, 473480), (178, 457520), (190, 428624), (215, 378784), (224, 363565), (266, 306160), (280, 290852), (301, 270560), (304, 267890), (344, 236740), (356, 228760), (380, 214312), (430, 189392), (445, 183008), (532, 153080), (560, 145426), (602, 135280), (608, 133945), (623, 130720), (665, 122464), (688, 118370), (712, 114380), (760, 107156), (817, 99680), (860, 94696), (890, 91504), (1064, 76540), (1120, 72713), (1204, 67640), (1246, 65360), (1330, 61232), (1376, 59185), (1424, 57190), (1505, 54112), (1520, 53578), (1634, 49840), (1691, 48160), (1720, 47348), (1780, 45752), (2128, 38270), (2408, 33820), (2492, 32680), (2660, 30616), (2848, 28595), (3010, 27056), (3040, 26789), (3115, 26144), (3268, 24920), (3382, 24080), (3440, 23674), (3560, 22876), (3827, 21280), (4085, 19936), (4256, 19135), (4816, 16910), (4984, 16340), (5320, 15308), (5719, 14240), (6020, 13528), (6230, 13072), (6536, 12460), (6764, 12040), (6880, 11837), (7120, 11438), (7654, 10640), (8170, 9968), (8455, 9632)]