21218427

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{63719}}^1$

素因数の和:63762

約数の個数: 12

約数和(自身を含む): 31477680

約数和(自身を除く): 10259253

約数列:

[1, 3, 9, 37, 111, 333, 63719, 191157, 573471, 2357603, 7072809, 21218427]

約数ペア:

[(1, 21218427), (3, 7072809), (9, 2357603), (37, 573471), (111, 191157), (333, 63719)]