19953868

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{41227}}^1$

素因数の和:41253

約数の個数: 18

約数和(自身を含む): 38383268

約数和(自身を除く): 18429400

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 41227, 82454, 164908, 453497, 906994, 1813988, 4988467, 9976934, 19953868]

約数ペア:

[(1, 19953868), (2, 9976934), (4, 4988467), (11, 1813988), (22, 906994), (44, 453497), (121, 164908), (242, 82454), (484, 41227)]