18904921

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{173}}^1\times {\mathrm{233}}^1$

素因数の和:480

約数の個数: 16

約数和(自身を含む): 22149504

約数和(自身を除く): 3244583

約数列:

[1, 7, 67, 173, 233, 469, 1211, 1631, 11591, 15611, 40309, 81137, 109277, 282163, 2700703, 18904921]

約数ペア:

[(1, 18904921), (7, 2700703), (67, 282163), (173, 109277), (233, 81137), (469, 40309), (1211, 15611), (1631, 11591)]