20744640

素因数分解:

$2^6\times 3^3\times 5^1\times 7^4$

素因数の和:54

約数の個数: 280

約数和(自身を含む): 85374480

約数和(自身を除く): 64629840

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 32, 35, 36, 40, 42, 45, 48, 49, 54, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 98, 105, 108, 112, 120, 126, 135, 140, 144, 147, 160, 168, 180, 189, 192, 196, 210, 216, 224, 240, 245, 252, 270, 280, 288, 294, 315, 320, 336, 343, 360, 378, 392, 420, 432, 441, 448, 480, 490, 504, 540, 560, 576, 588, 630, 672, 686, 720, 735, 756, 784, 840, 864, 882, 945, 960, 980, 1008, 1029, 1080, 1120, 1176, 1260, 1323, 1344, 1372, 1440, 1470, 1512, 1568, 1680, 1715, 1728, 1764, 1890, 1960, 2016, 2058, 2160, 2205, 2240, 2352, 2401, 2520, 2646, 2744, 2880, 2940, 3024, 3087, 3136, 3360, 3430, 3528, 3780, 3920, 4032, 4116, 4320, 4410, 4704, 4802, 5040, 5145, 5292, 5488, 5880, 6048, 6174, 6615, 6720, 6860, 7056, 7203, 7560, 7840, 8232, 8640, 8820, 9261, 9408, 9604, 10080, 10290, 10584, 10976, 11760, 12005, 12096, 12348, 13230, 13720, 14112, 14406, 15120, 15435, 15680, 16464, 17640, 18522, 19208, 20160, 20580, 21168, 21609, 21952, 23520, 24010, 24696, 26460, 27440, 28224, 28812, 30240, 30870, 32928, 35280, 36015, 37044, 38416, 41160, 42336, 43218, 46305, 47040, 48020, 49392, 52920, 54880, 57624, 60480, 61740, 64827, 65856, 70560, 72030, 74088, 76832, 82320, 84672, 86436, 92610, 96040, 98784, 105840, 108045, 109760, 115248, 123480, 129654, 141120, 144060, 148176, 153664, 164640, 172872, 185220, 192080, 197568, 211680, 216090, 230496, 246960, 259308, 288120, 296352, 324135, 329280, 345744, 370440, 384160, 423360, 432180, 460992, 493920, 518616, 576240, 592704, 648270, 691488, 740880, 768320, 864360, 987840, 1037232, 1152480, 1296540, 1382976, 1481760, 1728720, 2074464, 2304960, 2593080, 2963520, 3457440, 4148928, 5186160, 6914880, 10372320, 20744640]

約数ペア:

[(1, 20744640), (2, 10372320), (3, 6914880), (4, 5186160), (5, 4148928), (6, 3457440), (7, 2963520), (8, 2593080), (9, 2304960), (10, 2074464), (12, 1728720), (14, 1481760), (15, 1382976), (16, 1296540), (18, 1152480), (20, 1037232), (21, 987840), (24, 864360), (27, 768320), (28, 740880), (30, 691488), (32, 648270), (35, 592704), (36, 576240), (40, 518616), (42, 493920), (45, 460992), (48, 432180), (49, 423360), (54, 384160), (56, 370440), (60, 345744), (63, 329280), (64, 324135), (70, 296352), (72, 288120), (80, 259308), (84, 246960), (90, 230496), (96, 216090), (98, 211680), (105, 197568), (108, 192080), (112, 185220), (120, 172872), (126, 164640), (135, 153664), (140, 148176), (144, 144060), (147, 141120), (160, 129654), (168, 123480), (180, 115248), (189, 109760), (192, 108045), (196, 105840), (210, 98784), (216, 96040), (224, 92610), (240, 86436), (245, 84672), (252, 82320), (270, 76832), (280, 74088), (288, 72030), (294, 70560), (315, 65856), (320, 64827), (336, 61740), (343, 60480), (360, 57624), (378, 54880), (392, 52920), (420, 49392), (432, 48020), (441, 47040), (448, 46305), (480, 43218), (490, 42336), (504, 41160), (540, 38416), (560, 37044), (576, 36015), (588, 35280), (630, 32928), (672, 30870), (686, 30240), (720, 28812), (735, 28224), (756, 27440), (784, 26460), (840, 24696), (864, 24010), (882, 23520), (945, 21952), (960, 21609), (980, 21168), (1008, 20580), (1029, 20160), (1080, 19208), (1120, 18522), (1176, 17640), (1260, 16464), (1323, 15680), (1344, 15435), (1372, 15120), (1440, 14406), (1470, 14112), (1512, 13720), (1568, 13230), (1680, 12348), (1715, 12096), (1728, 12005), (1764, 11760), (1890, 10976), (1960, 10584), (2016, 10290), (2058, 10080), (2160, 9604), (2205, 9408), (2240, 9261), (2352, 8820), (2401, 8640), (2520, 8232), (2646, 7840), (2744, 7560), (2880, 7203), (2940, 7056), (3024, 6860), (3087, 6720), (3136, 6615), (3360, 6174), (3430, 6048), (3528, 5880), (3780, 5488), (3920, 5292), (4032, 5145), (4116, 5040), (4320, 4802), (4410, 4704)]