21671377

素因数分解:

$7^2\times {\mathrm{13}}^2\times {\mathrm{2617}}^1$

素因数の和:2657

約数の個数: 18

約数和(自身を含む): 27308358

約数和(自身を除く): 5636981

約数列:

[1, 7, 13, 49, 91, 169, 637, 1183, 2617, 8281, 18319, 34021, 128233, 238147, 442273, 1667029, 3095911, 21671377]

約数ペア:

[(1, 21671377), (7, 3095911), (13, 1667029), (49, 442273), (91, 238147), (169, 128233), (637, 34021), (1183, 18319), (2617, 8281)]