21080769

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1\times {\mathrm{487}}^1$

素因数の和:844

約数の個数: 16

約数和(自身を含む): 28858368

約数和(自身を除く): 7777599

約数列:

[1, 3, 47, 141, 307, 487, 921, 1461, 14429, 22889, 43287, 68667, 149509, 448527, 7026923, 21080769]

約数ペア:

[(1, 21080769), (3, 7026923), (47, 448527), (141, 149509), (307, 68667), (487, 43287), (921, 22889), (1461, 14429)]