261807

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{137}}^1$

素因数の和:167

約数の個数: 24

約数和(自身を含む): 440496

約数和(自身を除く): 178689

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 137, 147, 273, 411, 637, 959, 1781, 1911, 2877, 5343, 6713, 12467, 20139, 37401, 87269, 261807]

約数ペア:

[(1, 261807), (3, 87269), (7, 37401), (13, 20139), (21, 12467), (39, 6713), (49, 5343), (91, 2877), (137, 1911), (147, 1781), (273, 959), (411, 637)]