19964880

素因数分解:

$2^4\times 3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1$

素因数の和:120

約数の個数: 240

約数和(自身を含む): 75828480

約数和(自身を除く): 55863600

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 79, 80, 81, 90, 104, 108, 117, 120, 130, 135, 144, 156, 158, 162, 180, 195, 208, 216, 234, 237, 240, 243, 260, 270, 312, 316, 324, 351, 360, 390, 395, 405, 432, 468, 474, 486, 520, 540, 585, 624, 632, 648, 702, 711, 720, 780, 790, 810, 936, 948, 972, 1027, 1040, 1053, 1080, 1170, 1185, 1215, 1264, 1296, 1404, 1422, 1560, 1580, 1620, 1755, 1872, 1896, 1944, 2054, 2106, 2133, 2160, 2340, 2370, 2430, 2808, 2844, 3081, 3120, 3159, 3160, 3240, 3510, 3555, 3792, 3888, 4108, 4212, 4266, 4680, 4740, 4860, 5135, 5265, 5616, 5688, 6162, 6318, 6320, 6399, 6480, 7020, 7110, 8216, 8424, 8532, 9243, 9360, 9480, 9720, 10270, 10530, 10665, 11376, 12324, 12636, 12798, 14040, 14220, 15405, 15795, 16432, 16848, 17064, 18486, 18960, 19197, 19440, 20540, 21060, 21330, 24648, 25272, 25596, 27729, 28080, 28440, 30810, 31590, 31995, 34128, 36972, 38394, 41080, 42120, 42660, 46215, 49296, 50544, 51192, 55458, 56880, 61620, 63180, 63990, 73944, 76788, 82160, 83187, 84240, 85320, 92430, 95985, 102384, 110916, 123240, 126360, 127980, 138645, 147888, 153576, 166374, 170640, 184860, 191970, 221832, 246480, 249561, 252720, 255960, 277290, 307152, 332748, 369720, 383940, 415935, 443664, 499122, 511920, 554580, 665496, 739440, 767880, 831870, 998244, 1109160, 1247805, 1330992, 1535760, 1663740, 1996488, 2218320, 2495610, 3327480, 3992976, 4991220, 6654960, 9982440, 19964880]

約数ペア:

[(1, 19964880), (2, 9982440), (3, 6654960), (4, 4991220), (5, 3992976), (6, 3327480), (8, 2495610), (9, 2218320), (10, 1996488), (12, 1663740), (13, 1535760), (15, 1330992), (16, 1247805), (18, 1109160), (20, 998244), (24, 831870), (26, 767880), (27, 739440), (30, 665496), (36, 554580), (39, 511920), (40, 499122), (45, 443664), (48, 415935), (52, 383940), (54, 369720), (60, 332748), (65, 307152), (72, 277290), (78, 255960), (79, 252720), (80, 249561), (81, 246480), (90, 221832), (104, 191970), (108, 184860), (117, 170640), (120, 166374), (130, 153576), (135, 147888), (144, 138645), (156, 127980), (158, 126360), (162, 123240), (180, 110916), (195, 102384), (208, 95985), (216, 92430), (234, 85320), (237, 84240), (240, 83187), (243, 82160), (260, 76788), (270, 73944), (312, 63990), (316, 63180), (324, 61620), (351, 56880), (360, 55458), (390, 51192), (395, 50544), (405, 49296), (432, 46215), (468, 42660), (474, 42120), (486, 41080), (520, 38394), (540, 36972), (585, 34128), (624, 31995), (632, 31590), (648, 30810), (702, 28440), (711, 28080), (720, 27729), (780, 25596), (790, 25272), (810, 24648), (936, 21330), (948, 21060), (972, 20540), (1027, 19440), (1040, 19197), (1053, 18960), (1080, 18486), (1170, 17064), (1185, 16848), (1215, 16432), (1264, 15795), (1296, 15405), (1404, 14220), (1422, 14040), (1560, 12798), (1580, 12636), (1620, 12324), (1755, 11376), (1872, 10665), (1896, 10530), (1944, 10270), (2054, 9720), (2106, 9480), (2133, 9360), (2160, 9243), (2340, 8532), (2370, 8424), (2430, 8216), (2808, 7110), (2844, 7020), (3081, 6480), (3120, 6399), (3159, 6320), (3160, 6318), (3240, 6162), (3510, 5688), (3555, 5616), (3792, 5265), (3888, 5135), (4108, 4860), (4212, 4740), (4266, 4680)]