21005907

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{8039}}^1$

素因数の和:8122

約数の個数: 16

約数和(自身を含む): 30616320

約数和(自身を除く): 9610413

約数列:

[1, 3, 13, 39, 67, 201, 871, 2613, 8039, 24117, 104507, 313521, 538613, 1615839, 7001969, 21005907]

約数ペア:

[(1, 21005907), (3, 7001969), (13, 1615839), (39, 538613), (67, 313521), (201, 104507), (871, 24117), (2613, 8039)]