21440809

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{641}}^1$

素因数の和:768

約数の個数: 16

約数和(自身を含む): 24159744

約数和(自身を除く): 2718935

約数列:

[1, 13, 31, 83, 403, 641, 1079, 2573, 8333, 19871, 33449, 53203, 258323, 691639, 1649293, 21440809]

約数ペア:

[(1, 21440809), (13, 1649293), (31, 691639), (83, 258323), (403, 53203), (641, 33449), (1079, 19871), (2573, 8333)]