21821849

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{449}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 25660800

約数和(自身を除く): 3838951

約数列:

[1, 7, 53, 131, 371, 449, 917, 3143, 6943, 23797, 48601, 58819, 166579, 411733, 3117407, 21821849]

約数ペア:

[(1, 21821849), (7, 3117407), (53, 411733), (131, 166579), (371, 58819), (449, 48601), (917, 23797), (3143, 6943)]