21747680

素因数分解:

$2^5\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{109}}^1$

素因数の和:196

約数の個数: 96

約数和(自身を含む): 54885600

約数和(自身を除く): 33137920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 43, 58, 80, 86, 109, 116, 145, 160, 172, 215, 218, 232, 290, 344, 430, 436, 464, 545, 580, 688, 860, 872, 928, 1090, 1160, 1247, 1376, 1720, 1744, 2180, 2320, 2494, 3161, 3440, 3488, 4360, 4640, 4687, 4988, 6235, 6322, 6880, 8720, 9374, 9976, 12470, 12644, 15805, 17440, 18748, 19952, 23435, 24940, 25288, 31610, 37496, 39904, 46870, 49880, 50576, 63220, 74992, 93740, 99760, 101152, 126440, 135923, 149984, 187480, 199520, 252880, 271846, 374960, 505760, 543692, 679615, 749920, 1087384, 1359230, 2174768, 2718460, 4349536, 5436920, 10873840, 21747680]

約数ペア:

[(1, 21747680), (2, 10873840), (4, 5436920), (5, 4349536), (8, 2718460), (10, 2174768), (16, 1359230), (20, 1087384), (29, 749920), (32, 679615), (40, 543692), (43, 505760), (58, 374960), (80, 271846), (86, 252880), (109, 199520), (116, 187480), (145, 149984), (160, 135923), (172, 126440), (215, 101152), (218, 99760), (232, 93740), (290, 74992), (344, 63220), (430, 50576), (436, 49880), (464, 46870), (545, 39904), (580, 37496), (688, 31610), (860, 25288), (872, 24940), (928, 23435), (1090, 19952), (1160, 18748), (1247, 17440), (1376, 15805), (1720, 12644), (1744, 12470), (2180, 9976), (2320, 9374), (2494, 8720), (3161, 6880), (3440, 6322), (3488, 6235), (4360, 4988), (4640, 4687)]