19984320

素因数分解:

$2^6\times 3^5\times 5^1\times {\mathrm{257}}^1$

素因数の和:289

約数の個数: 168

約数和(自身を含む): 71560944

約数和(自身を除く): 51576624

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, 64, 72, 80, 81, 90, 96, 108, 120, 135, 144, 160, 162, 180, 192, 216, 240, 243, 257, 270, 288, 320, 324, 360, 405, 432, 480, 486, 514, 540, 576, 648, 720, 771, 810, 864, 960, 972, 1028, 1080, 1215, 1285, 1296, 1440, 1542, 1620, 1728, 1944, 2056, 2160, 2313, 2430, 2570, 2592, 2880, 3084, 3240, 3855, 3888, 4112, 4320, 4626, 4860, 5140, 5184, 6168, 6480, 6939, 7710, 7776, 8224, 8640, 9252, 9720, 10280, 11565, 12336, 12960, 13878, 15420, 15552, 16448, 18504, 19440, 20560, 20817, 23130, 24672, 25920, 27756, 30840, 34695, 37008, 38880, 41120, 41634, 46260, 49344, 55512, 61680, 62451, 69390, 74016, 77760, 82240, 83268, 92520, 104085, 111024, 123360, 124902, 138780, 148032, 166536, 185040, 208170, 222048, 246720, 249804, 277560, 312255, 333072, 370080, 416340, 444096, 499608, 555120, 624510, 666144, 740160, 832680, 999216, 1110240, 1249020, 1332288, 1665360, 1998432, 2220480, 2498040, 3330720, 3996864, 4996080, 6661440, 9992160, 19984320]

約数ペア:

[(1, 19984320), (2, 9992160), (3, 6661440), (4, 4996080), (5, 3996864), (6, 3330720), (8, 2498040), (9, 2220480), (10, 1998432), (12, 1665360), (15, 1332288), (16, 1249020), (18, 1110240), (20, 999216), (24, 832680), (27, 740160), (30, 666144), (32, 624510), (36, 555120), (40, 499608), (45, 444096), (48, 416340), (54, 370080), (60, 333072), (64, 312255), (72, 277560), (80, 249804), (81, 246720), (90, 222048), (96, 208170), (108, 185040), (120, 166536), (135, 148032), (144, 138780), (160, 124902), (162, 123360), (180, 111024), (192, 104085), (216, 92520), (240, 83268), (243, 82240), (257, 77760), (270, 74016), (288, 69390), (320, 62451), (324, 61680), (360, 55512), (405, 49344), (432, 46260), (480, 41634), (486, 41120), (514, 38880), (540, 37008), (576, 34695), (648, 30840), (720, 27756), (771, 25920), (810, 24672), (864, 23130), (960, 20817), (972, 20560), (1028, 19440), (1080, 18504), (1215, 16448), (1285, 15552), (1296, 15420), (1440, 13878), (1542, 12960), (1620, 12336), (1728, 11565), (1944, 10280), (2056, 9720), (2160, 9252), (2313, 8640), (2430, 8224), (2570, 7776), (2592, 7710), (2880, 6939), (3084, 6480), (3240, 6168), (3855, 5184), (3888, 5140), (4112, 4860), (4320, 4626)]