21371559

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{15061}}^1$

素因数の和:15118

約数の個数: 16

約数和(自身を含む): 31810944

約数和(自身を除く): 10439385

約数列:

[1, 3, 11, 33, 43, 129, 473, 1419, 15061, 45183, 165671, 497013, 647623, 1942869, 7123853, 21371559]

約数ペア:

[(1, 21371559), (3, 7123853), (11, 1942869), (33, 647623), (43, 497013), (129, 165671), (473, 45183), (1419, 15061)]