18978929

素因数分解:

${\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:520

約数の個数: 16

約数和(自身を含む): 20839680

約数和(自身を除く): 1860751

約数列:

[1, 19, 47, 53, 401, 893, 1007, 2491, 7619, 18847, 21253, 47329, 358093, 403807, 998891, 18978929]

約数ペア:

[(1, 18978929), (19, 998891), (47, 403807), (53, 358093), (401, 47329), (893, 21253), (1007, 18847), (2491, 7619)]