20818623

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{52177}}^1$

素因数の和:52206

約数の個数: 16

約数和(自身を含む): 33393920

約数和(自身を除く): 12575297

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 52177, 156531, 365239, 991363, 1095717, 2974089, 6939541, 20818623]

約数ペア:

[(1, 20818623), (3, 6939541), (7, 2974089), (19, 1095717), (21, 991363), (57, 365239), (133, 156531), (399, 52177)]