217872721

素因数分解:

${\mathrm{11}}^4\times {\mathrm{23}}^1\times {\mathrm{647}}^1$

素因数の和:714

約数の個数: 20

約数和(自身を含む): 250464960

約数和(自身を除く): 32592239

約数列:

[1, 11, 23, 121, 253, 647, 1331, 2783, 7117, 14641, 14881, 30613, 78287, 163691, 336743, 861157, 1800601, 9472727, 19806611, 217872721]

約数ペア:

[(1, 217872721), (11, 19806611), (23, 9472727), (121, 1800601), (253, 861157), (647, 336743), (1331, 163691), (2783, 78287), (7117, 30613), (14641, 14881)]