20399141

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{21911}}^1$

素因数の和:21944

約数の個数: 12

約数和(自身を含む): 24979680

約数和(自身を除く): 4580539

約数列:

[1, 7, 19, 49, 133, 931, 21911, 153377, 416309, 1073639, 2914163, 20399141]

約数ペア:

[(1, 20399141), (7, 2914163), (19, 1073639), (49, 416309), (133, 153377), (931, 21911)]