20887565

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:253

約数の個数: 24

約数和(自身を含む): 26875800

約数和(自身を除く): 5988235

約数列:

[1, 5, 23, 53, 115, 149, 265, 529, 745, 1219, 2645, 3427, 6095, 7897, 17135, 28037, 39485, 78821, 140185, 181631, 394105, 908155, 4177513, 20887565]

約数ペア:

[(1, 20887565), (5, 4177513), (23, 908155), (53, 394105), (115, 181631), (149, 140185), (265, 78821), (529, 39485), (745, 28037), (1219, 17135), (2645, 7897), (3427, 6095)]