20878560

素因数分解:

$2^5\times 3^6\times 5^1\times {\mathrm{179}}^1$

素因数の和:212

約数の個数: 168

約数和(自身を含む): 74367720

約数和(自身を除く): 53489160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 32, 36, 40, 45, 48, 54, 60, 72, 80, 81, 90, 96, 108, 120, 135, 144, 160, 162, 179, 180, 216, 240, 243, 270, 288, 324, 358, 360, 405, 432, 480, 486, 537, 540, 648, 716, 720, 729, 810, 864, 895, 972, 1074, 1080, 1215, 1296, 1432, 1440, 1458, 1611, 1620, 1790, 1944, 2148, 2160, 2430, 2592, 2685, 2864, 2916, 3222, 3240, 3580, 3645, 3888, 4296, 4320, 4833, 4860, 5370, 5728, 5832, 6444, 6480, 7160, 7290, 7776, 8055, 8592, 9666, 9720, 10740, 11664, 12888, 12960, 14320, 14499, 14580, 16110, 17184, 19332, 19440, 21480, 23328, 24165, 25776, 28640, 28998, 29160, 32220, 38664, 38880, 42960, 43497, 48330, 51552, 57996, 58320, 64440, 72495, 77328, 85920, 86994, 96660, 115992, 116640, 128880, 130491, 144990, 154656, 173988, 193320, 217485, 231984, 257760, 260982, 289980, 347976, 386640, 434970, 463968, 521964, 579960, 652455, 695952, 773280, 869940, 1043928, 1159920, 1304910, 1391904, 1739880, 2087856, 2319840, 2609820, 3479760, 4175712, 5219640, 6959520, 10439280, 20878560]

約数ペア:

[(1, 20878560), (2, 10439280), (3, 6959520), (4, 5219640), (5, 4175712), (6, 3479760), (8, 2609820), (9, 2319840), (10, 2087856), (12, 1739880), (15, 1391904), (16, 1304910), (18, 1159920), (20, 1043928), (24, 869940), (27, 773280), (30, 695952), (32, 652455), (36, 579960), (40, 521964), (45, 463968), (48, 434970), (54, 386640), (60, 347976), (72, 289980), (80, 260982), (81, 257760), (90, 231984), (96, 217485), (108, 193320), (120, 173988), (135, 154656), (144, 144990), (160, 130491), (162, 128880), (179, 116640), (180, 115992), (216, 96660), (240, 86994), (243, 85920), (270, 77328), (288, 72495), (324, 64440), (358, 58320), (360, 57996), (405, 51552), (432, 48330), (480, 43497), (486, 42960), (537, 38880), (540, 38664), (648, 32220), (716, 29160), (720, 28998), (729, 28640), (810, 25776), (864, 24165), (895, 23328), (972, 21480), (1074, 19440), (1080, 19332), (1215, 17184), (1296, 16110), (1432, 14580), (1440, 14499), (1458, 14320), (1611, 12960), (1620, 12888), (1790, 11664), (1944, 10740), (2148, 9720), (2160, 9666), (2430, 8592), (2592, 8055), (2685, 7776), (2864, 7290), (2916, 7160), (3222, 6480), (3240, 6444), (3580, 5832), (3645, 5728), (3888, 5370), (4296, 4860), (4320, 4833)]