81518455

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{20929}}^1$

素因数の和:20994

約数の個数: 16

約数和(自身を含む): 105487200

約数和(自身を除く): 23968745

約数列:

[1, 5, 19, 41, 95, 205, 779, 3895, 20929, 104645, 397651, 858089, 1988255, 4290445, 16303691, 81518455]

約数ペア:

[(1, 81518455), (5, 16303691), (19, 4290445), (41, 1988255), (95, 858089), (205, 397651), (779, 104645), (3895, 20929)]