21217278

素因数分解:

$2^1\times 3^1\times {\mathrm{53}}^1\times {\mathrm{66721}}^1$

素因数の和:66779

約数の個数: 16

約数和(自身を含む): 43235856

約数和(自身を除く): 22018578

約数列:

[1, 2, 3, 6, 53, 106, 159, 318, 66721, 133442, 200163, 400326, 3536213, 7072426, 10608639, 21217278]

約数ペア:

[(1, 21217278), (2, 10608639), (3, 7072426), (6, 3536213), (53, 400326), (106, 200163), (159, 133442), (318, 66721)]