19978119

素因数分解:

$3^2\times 7^1\times {\mathrm{233}}^1\times {\mathrm{1361}}^1$

素因数の和:1607

約数の個数: 24

約数和(自身を含む): 33145632

約数和(自身を除く): 13167513

約数列:

[1, 3, 7, 9, 21, 63, 233, 699, 1361, 1631, 2097, 4083, 4893, 9527, 12249, 14679, 28581, 85743, 317113, 951339, 2219791, 2854017, 6659373, 19978119]

約数ペア:

[(1, 19978119), (3, 6659373), (7, 2854017), (9, 2219791), (21, 951339), (63, 317113), (233, 85743), (699, 28581), (1361, 14679), (1631, 12249), (2097, 9527), (4083, 4893)]