18681901

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{157}}^1\times {\mathrm{191}}^1$

素因数の和:444

約数の個数: 16

約数和(自身を含む): 21841920

約数和(自身を除く): 3160019

約数列:

[1, 7, 89, 157, 191, 623, 1099, 1337, 13973, 16999, 29987, 97811, 118993, 209909, 2668843, 18681901]

約数ペア:

[(1, 18681901), (7, 2668843), (89, 209909), (157, 118993), (191, 97811), (623, 29987), (1099, 16999), (1337, 13973)]