21856457

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{2143}}^1$

素因数の和:2228

約数の個数: 16

約数和(自身を含む): 26345472

約数和(自身を除く): 4489015

約数列:

[1, 7, 31, 47, 217, 329, 1457, 2143, 10199, 15001, 66433, 100721, 465031, 705047, 3122351, 21856457]

約数ペア:

[(1, 21856457), (7, 3122351), (31, 705047), (47, 465031), (217, 100721), (329, 66433), (1457, 15001), (2143, 10199)]