18220391

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{103}}^1\times {\mathrm{683}}^1$

素因数の和:830

約数の個数: 16

約数和(自身を含む): 21625344

約数和(自身を除く): 3404953

約数列:

[1, 7, 37, 103, 259, 683, 721, 3811, 4781, 25271, 26677, 70349, 176897, 492443, 2602913, 18220391]

約数ペア:

[(1, 18220391), (7, 2602913), (37, 492443), (103, 176897), (259, 70349), (683, 26677), (721, 25271), (3811, 4781)]