18721241

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:114

約数の個数: 36

約数和(自身を含む): 25357248

約数和(自身を除く): 6636007

約数列:

[1, 7, 11, 23, 31, 77, 121, 161, 217, 253, 341, 713, 847, 961, 1771, 2387, 2783, 3751, 4991, 6727, 7843, 10571, 19481, 22103, 26257, 54901, 73997, 86273, 116281, 154721, 243133, 603911, 813967, 1701931, 2674463, 18721241]

約数ペア:

[(1, 18721241), (7, 2674463), (11, 1701931), (23, 813967), (31, 603911), (77, 243133), (121, 154721), (161, 116281), (217, 86273), (253, 73997), (341, 54901), (713, 26257), (847, 22103), (961, 19481), (1771, 10571), (2387, 7843), (2783, 6727), (3751, 4991)]