81347725

素因数分解:

$5^2\times {\mathrm{59}}^1\times {\mathrm{131}}^1\times {\mathrm{421}}^1$

素因数の和:621

約数の個数: 24

約数和(自身を含む): 103609440

約数和(自身を除く): 22261715

約数列:

[1, 5, 25, 59, 131, 295, 421, 655, 1475, 2105, 3275, 7729, 10525, 24839, 38645, 55151, 124195, 193225, 275755, 620975, 1378775, 3253909, 16269545, 81347725]

約数ペア:

[(1, 81347725), (5, 16269545), (25, 3253909), (59, 1378775), (131, 620975), (295, 275755), (421, 193225), (655, 124195), (1475, 55151), (2105, 38645), (3275, 24839), (7729, 10525)]