21404739

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{1307}}^1$

素因数の和:1466

約数の個数: 16

約数和(自身を含む): 29382912

約数和(自身を除く): 7978173

約数列:

[1, 3, 53, 103, 159, 309, 1307, 3921, 5459, 16377, 69271, 134621, 207813, 403863, 7134913, 21404739]

約数ペア:

[(1, 21404739), (3, 7134913), (53, 403863), (103, 207813), (159, 134621), (309, 69271), (1307, 16377), (3921, 5459)]