21638309

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{59}}^1\times {\mathrm{433}}^1$

素因数の和:521

約数の個数: 24

約数和(自身を含む): 27706560

約数和(自身を除く): 6068251

約数列:

[1, 7, 11, 59, 77, 121, 413, 433, 649, 847, 3031, 4543, 4763, 7139, 25547, 33341, 49973, 52393, 178829, 281017, 366751, 1967119, 3091187, 21638309]

約数ペア:

[(1, 21638309), (7, 3091187), (11, 1967119), (59, 366751), (77, 281017), (121, 178829), (413, 52393), (433, 49973), (649, 33341), (847, 25547), (3031, 7139), (4543, 4763)]