20391718

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{3539}}^1$

素因数の和:3651

約数の個数: 16

約数和(自身を含む): 31775040

約数和(自身を除く): 11383322

約数列:

[1, 2, 43, 67, 86, 134, 2881, 3539, 5762, 7078, 152177, 237113, 304354, 474226, 10195859, 20391718]

約数ペア:

[(1, 20391718), (2, 10195859), (43, 474226), (67, 304354), (86, 237113), (134, 152177), (2881, 7078), (3539, 5762)]