20489760

素因数分解:

$2^5\times 3^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:78

約数の個数: 288

約数和(自身を含む): 79252992

約数和(自身を除く): 58763232

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 20, 24, 27, 30, 31, 32, 34, 36, 40, 45, 48, 51, 54, 60, 62, 68, 72, 80, 81, 85, 90, 93, 96, 102, 108, 120, 124, 135, 136, 144, 153, 155, 160, 162, 170, 180, 186, 204, 216, 240, 243, 248, 255, 270, 272, 279, 288, 306, 310, 324, 340, 360, 372, 405, 408, 432, 459, 465, 480, 486, 496, 510, 527, 540, 544, 558, 612, 620, 648, 680, 720, 744, 765, 810, 816, 837, 864, 918, 930, 972, 992, 1020, 1054, 1080, 1116, 1215, 1224, 1240, 1296, 1360, 1377, 1395, 1440, 1488, 1530, 1581, 1620, 1632, 1674, 1836, 1860, 1944, 2040, 2108, 2160, 2232, 2295, 2430, 2448, 2480, 2511, 2592, 2635, 2720, 2754, 2790, 2976, 3060, 3162, 3240, 3348, 3672, 3720, 3888, 4080, 4131, 4185, 4216, 4320, 4464, 4590, 4743, 4860, 4896, 4960, 5022, 5270, 5508, 5580, 6120, 6324, 6480, 6696, 6885, 7344, 7440, 7533, 7776, 7905, 8160, 8262, 8370, 8432, 8928, 9180, 9486, 9720, 10044, 10540, 11016, 11160, 12240, 12555, 12648, 12960, 13392, 13770, 14229, 14688, 14880, 15066, 15810, 16524, 16740, 16864, 18360, 18972, 19440, 20088, 20655, 21080, 22032, 22320, 23715, 24480, 25110, 25296, 26784, 27540, 28458, 30132, 31620, 33048, 33480, 36720, 37665, 37944, 38880, 40176, 41310, 42160, 42687, 44064, 44640, 47430, 50220, 50592, 55080, 56916, 60264, 63240, 66096, 66960, 71145, 73440, 75330, 75888, 80352, 82620, 84320, 85374, 94860, 100440, 110160, 113832, 120528, 126480, 128061, 132192, 133920, 142290, 150660, 151776, 165240, 170748, 189720, 200880, 213435, 220320, 227664, 241056, 252960, 256122, 284580, 301320, 330480, 341496, 379440, 401760, 426870, 455328, 512244, 569160, 602640, 640305, 660960, 682992, 758880, 853740, 1024488, 1138320, 1205280, 1280610, 1365984, 1707480, 2048976, 2276640, 2561220, 3414960, 4097952, 5122440, 6829920, 10244880, 20489760]

約数ペア:

[(1, 20489760), (2, 10244880), (3, 6829920), (4, 5122440), (5, 4097952), (6, 3414960), (8, 2561220), (9, 2276640), (10, 2048976), (12, 1707480), (15, 1365984), (16, 1280610), (17, 1205280), (18, 1138320), (20, 1024488), (24, 853740), (27, 758880), (30, 682992), (31, 660960), (32, 640305), (34, 602640), (36, 569160), (40, 512244), (45, 455328), (48, 426870), (51, 401760), (54, 379440), (60, 341496), (62, 330480), (68, 301320), (72, 284580), (80, 256122), (81, 252960), (85, 241056), (90, 227664), (93, 220320), (96, 213435), (102, 200880), (108, 189720), (120, 170748), (124, 165240), (135, 151776), (136, 150660), (144, 142290), (153, 133920), (155, 132192), (160, 128061), (162, 126480), (170, 120528), (180, 113832), (186, 110160), (204, 100440), (216, 94860), (240, 85374), (243, 84320), (248, 82620), (255, 80352), (270, 75888), (272, 75330), (279, 73440), (288, 71145), (306, 66960), (310, 66096), (324, 63240), (340, 60264), (360, 56916), (372, 55080), (405, 50592), (408, 50220), (432, 47430), (459, 44640), (465, 44064), (480, 42687), (486, 42160), (496, 41310), (510, 40176), (527, 38880), (540, 37944), (544, 37665), (558, 36720), (612, 33480), (620, 33048), (648, 31620), (680, 30132), (720, 28458), (744, 27540), (765, 26784), (810, 25296), (816, 25110), (837, 24480), (864, 23715), (918, 22320), (930, 22032), (972, 21080), (992, 20655), (1020, 20088), (1054, 19440), (1080, 18972), (1116, 18360), (1215, 16864), (1224, 16740), (1240, 16524), (1296, 15810), (1360, 15066), (1377, 14880), (1395, 14688), (1440, 14229), (1488, 13770), (1530, 13392), (1581, 12960), (1620, 12648), (1632, 12555), (1674, 12240), (1836, 11160), (1860, 11016), (1944, 10540), (2040, 10044), (2108, 9720), (2160, 9486), (2232, 9180), (2295, 8928), (2430, 8432), (2448, 8370), (2480, 8262), (2511, 8160), (2592, 7905), (2635, 7776), (2720, 7533), (2754, 7440), (2790, 7344), (2976, 6885), (3060, 6696), (3162, 6480), (3240, 6324), (3348, 6120), (3672, 5580), (3720, 5508), (3888, 5270), (4080, 5022), (4131, 4960), (4185, 4896), (4216, 4860), (4320, 4743), (4464, 4590)]