21306868

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{683}}^1\times {\mathrm{709}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 40793760

約数和(自身を除く): 19486892

約数列:

[1, 2, 4, 11, 22, 44, 683, 709, 1366, 1418, 2732, 2836, 7513, 7799, 15026, 15598, 30052, 31196, 484247, 968494, 1936988, 5326717, 10653434, 21306868]

約数ペア:

[(1, 21306868), (2, 10653434), (4, 5326717), (11, 1936988), (22, 968494), (44, 484247), (683, 31196), (709, 30052), (1366, 15598), (1418, 15026), (2732, 7799), (2836, 7513)]