18791969

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{229}}^1\times {\mathrm{617}}^1$

素因数の和:872

約数の個数: 16

約数和(自身を含む): 22742400

約数和(自身を除く): 3950431

約数列:

[1, 7, 19, 133, 229, 617, 1603, 4319, 4351, 11723, 30457, 82061, 141293, 989051, 2684567, 18791969]

約数ペア:

[(1, 18791969), (7, 2684567), (19, 989051), (133, 141293), (229, 82061), (617, 30457), (1603, 11723), (4319, 4351)]