21804139

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{677}}^1$

素因数の和:834

約数の個数: 16

約数和(自身を含む): 25774848

約数和(自身を除く): 3970709

約数列:

[1, 7, 43, 107, 301, 677, 749, 4601, 4739, 29111, 32207, 72439, 203777, 507073, 3114877, 21804139]

約数ペア:

[(1, 21804139), (7, 3114877), (43, 507073), (107, 203777), (301, 72439), (677, 32207), (749, 29111), (4601, 4739)]