18238521

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{23473}}^1$

素因数の和:23520

約数の個数: 16

約数和(自身を含む): 28544384

約数和(自身を除く): 10305863

約数列:

[1, 3, 7, 21, 37, 111, 259, 777, 23473, 70419, 164311, 492933, 868501, 2605503, 6079507, 18238521]

約数ペア:

[(1, 18238521), (3, 6079507), (7, 2605503), (21, 868501), (37, 492933), (111, 164311), (259, 70419), (777, 23473)]