21247369

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{4793}}^1$

素因数の和:4848

約数の個数: 16

約数和(自身を含む): 25772544

約数和(自身を除く): 4525175

約数列:

[1, 11, 13, 31, 143, 341, 403, 4433, 4793, 52723, 62309, 148583, 685399, 1634413, 1931579, 21247369]

約数ペア:

[(1, 21247369), (11, 1931579), (13, 1634413), (31, 685399), (143, 148583), (341, 62309), (403, 52723), (4433, 4793)]