20998131

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{90901}}^1$

素因数の和:90922

約数の個数: 16

約数和(自身を含む): 34906368

約数和(自身を除く): 13908237

約数列:

[1, 3, 7, 11, 21, 33, 77, 231, 90901, 272703, 636307, 999911, 1908921, 2999733, 6999377, 20998131]

約数ペア:

[(1, 20998131), (3, 6999377), (7, 2999733), (11, 1908921), (21, 999911), (33, 636307), (77, 272703), (231, 90901)]