899999920

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{3559}}^1$

素因数の和:3710

約数の個数: 80

約数和(自身を含む): 2185128000

約数和(自身を除く): 1285128080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 109, 116, 145, 218, 232, 290, 436, 464, 545, 580, 872, 1090, 1160, 1744, 2180, 2320, 3161, 3559, 4360, 6322, 7118, 8720, 12644, 14236, 15805, 17795, 25288, 28472, 31610, 35590, 50576, 56944, 63220, 71180, 103211, 126440, 142360, 206422, 252880, 284720, 387931, 412844, 516055, 775862, 825688, 1032110, 1551724, 1651376, 1939655, 2064220, 3103448, 3879310, 4128440, 6206896, 7758620, 8256880, 11249999, 15517240, 22499998, 31034480, 44999996, 56249995, 89999992, 112499990, 179999984, 224999980, 449999960, 899999920]

約数ペア:

[(1, 899999920), (2, 449999960), (4, 224999980), (5, 179999984), (8, 112499990), (10, 89999992), (16, 56249995), (20, 44999996), (29, 31034480), (40, 22499998), (58, 15517240), (80, 11249999), (109, 8256880), (116, 7758620), (145, 6206896), (218, 4128440), (232, 3879310), (290, 3103448), (436, 2064220), (464, 1939655), (545, 1651376), (580, 1551724), (872, 1032110), (1090, 825688), (1160, 775862), (1744, 516055), (2180, 412844), (2320, 387931), (3161, 284720), (3559, 252880), (4360, 206422), (6322, 142360), (7118, 126440), (8720, 103211), (12644, 71180), (14236, 63220), (15805, 56944), (17795, 50576), (25288, 35590), (28472, 31610)]