19902785

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{173}}^2$

素因数の和:377

約数の個数: 24

約数和(自身を含む): 28898880

約数和(自身を除く): 8996095

約数列:

[1, 5, 7, 19, 35, 95, 133, 173, 665, 865, 1211, 3287, 6055, 16435, 23009, 29929, 115045, 149645, 209503, 568651, 1047515, 2843255, 3980557, 19902785]

約数ペア:

[(1, 19902785), (5, 3980557), (7, 2843255), (19, 1047515), (35, 568651), (95, 209503), (133, 149645), (173, 115045), (665, 29929), (865, 23009), (1211, 16435), (3287, 6055)]