21921256

素因数分解:

$2^3\times 7^1\times {\mathrm{391451}}^1$

素因数の和:391464

約数の個数: 16

約数和(自身を含む): 46974240

約数和(自身を除く): 25052984

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 391451, 782902, 1565804, 2740157, 3131608, 5480314, 10960628, 21921256]

約数ペア:

[(1, 21921256), (2, 10960628), (4, 5480314), (7, 3131608), (8, 2740157), (14, 1565804), (28, 782902), (56, 391451)]