21000798721

素因数分解:

$7^2\times {\mathrm{6737}}^1\times {\mathrm{63617}}^1$

素因数の和:70368

約数の個数: 12

約数和(自身を含む): 24433510788

約数和(自身を除く): 3432712067

約数列:

[1, 7, 49, 6737, 47159, 63617, 330113, 445319, 3117233, 428587729, 3000114103, 21000798721]

約数ペア:

[(1, 21000798721), (7, 3000114103), (49, 428587729), (6737, 3117233), (47159, 445319), (63617, 330113)]