21789559

素因数分解:

${\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:247

約数の個数: 24

約数和(自身を含む): 25553024

約数和(自身を除く): 3763465

約数列:

[1, 11, 31, 37, 121, 157, 341, 407, 1147, 1727, 3751, 4477, 4867, 5809, 12617, 18997, 53537, 63899, 138787, 180079, 588907, 702889, 1980869, 21789559]

約数ペア:

[(1, 21789559), (11, 1980869), (31, 702889), (37, 588907), (121, 180079), (157, 138787), (341, 63899), (407, 53537), (1147, 18997), (1727, 12617), (3751, 5809), (4477, 4867)]