21920602

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{239}}^1\times {\mathrm{379}}^1$

素因数の和:642

約数の個数: 24

約数和(自身を含む): 36388800

約数和(自身を除く): 14468198

約数列:

[1, 2, 11, 22, 121, 239, 242, 379, 478, 758, 2629, 4169, 5258, 8338, 28919, 45859, 57838, 90581, 91718, 181162, 996391, 1992782, 10960301, 21920602]

約数ペア:

[(1, 21920602), (2, 10960301), (11, 1992782), (22, 996391), (121, 181162), (239, 91718), (242, 90581), (379, 57838), (478, 45859), (758, 28919), (2629, 8338), (4169, 5258)]