21389495

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{1013}}^1$

素因数の和:1162

約数の個数: 16

約数和(自身を含む): 26574912

約数和(自身を除く): 5185417

約数列:

[1, 5, 41, 103, 205, 515, 1013, 4223, 5065, 21115, 41533, 104339, 207665, 521695, 4277899, 21389495]

約数ペア:

[(1, 21389495), (5, 4277899), (41, 521695), (103, 207665), (205, 104339), (515, 41533), (1013, 21115), (4223, 5065)]