21072205

素因数分解:

$5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{1117}}^1$

素因数の和:1154

約数の個数: 32

約数和(自身を含む): 32198400

約数和(自身を除く): 11126195

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 343, 385, 539, 1117, 1715, 2695, 3773, 5585, 7819, 12287, 18865, 39095, 54733, 61435, 86009, 273665, 383131, 430045, 602063, 1915655, 3010315, 4214441, 21072205]

約数ペア:

[(1, 21072205), (5, 4214441), (7, 3010315), (11, 1915655), (35, 602063), (49, 430045), (55, 383131), (77, 273665), (245, 86009), (343, 61435), (385, 54733), (539, 39095), (1117, 18865), (1715, 12287), (2695, 7819), (3773, 5585)]