19988080

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5099}}^1$

素因数の和:5126

約数の個数: 60

約数和(自身を含む): 54070200

約数和(自身を除く): 34082120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5099, 10198, 20396, 25495, 35693, 40792, 50990, 71386, 81584, 101980, 142772, 178465, 203960, 249851, 285544, 356930, 407920, 499702, 571088, 713860, 999404, 1249255, 1427720, 1998808, 2498510, 2855440, 3997616, 4997020, 9994040, 19988080]

約数ペア:

[(1, 19988080), (2, 9994040), (4, 4997020), (5, 3997616), (7, 2855440), (8, 2498510), (10, 1998808), (14, 1427720), (16, 1249255), (20, 999404), (28, 713860), (35, 571088), (40, 499702), (49, 407920), (56, 356930), (70, 285544), (80, 249851), (98, 203960), (112, 178465), (140, 142772), (196, 101980), (245, 81584), (280, 71386), (392, 50990), (490, 40792), (560, 35693), (784, 25495), (980, 20396), (1960, 10198), (3920, 5099)]