21072261

素因数分解:

$3^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{7219}}^1$

素因数の和:7368

約数の個数: 16

約数和(自身を含む): 32345600

約数和(自身を除く): 11273339

約数列:

[1, 3, 7, 21, 139, 417, 973, 2919, 7219, 21657, 50533, 151599, 1003441, 3010323, 7024087, 21072261]

約数ペア:

[(1, 21072261), (3, 7024087), (7, 3010323), (21, 1003441), (139, 151599), (417, 50533), (973, 21657), (2919, 7219)]