19487984

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{71647}}^1$

素因数の和:71672

約数の個数: 20

約数和(自身を含む): 39979584

約数和(自身を除く): 20491600

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 71647, 143294, 286588, 573176, 1146352, 1217999, 2435998, 4871996, 9743992, 19487984]

約数ペア:

[(1, 19487984), (2, 9743992), (4, 4871996), (8, 2435998), (16, 1217999), (17, 1146352), (34, 573176), (68, 286588), (136, 143294), (272, 71647)]