19881953

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{5081}}^1$

素因数の和:5144

約数の個数: 16

約数和(自身を含む): 25044096

約数和(自身を除く): 5162143

約数列:

[1, 7, 13, 43, 91, 301, 559, 3913, 5081, 35567, 66053, 218483, 462371, 1529381, 2840279, 19881953]

約数ペア:

[(1, 19881953), (7, 2840279), (13, 1529381), (43, 462371), (91, 218483), (301, 66053), (559, 35567), (3913, 5081)]