21257383

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1\times {\mathrm{229}}^1$

素因数の和:474

約数の個数: 16

約数和(自身を含む): 24840000

約数和(自身を除く): 3582617

約数列:

[1, 7, 89, 149, 229, 623, 1043, 1603, 13261, 20381, 34121, 92827, 142667, 238847, 3036769, 21257383]

約数ペア:

[(1, 21257383), (7, 3036769), (89, 238847), (149, 142667), (229, 92827), (623, 34121), (1043, 20381), (1603, 13261)]