21205278

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{27397}}^1$

素因数の和:27448

約数の個数: 24

約数和(自身を含む): 47014968

約数和(自身を除く): 25809690

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 129, 258, 387, 774, 27397, 54794, 82191, 164382, 246573, 493146, 1178071, 2356142, 3534213, 7068426, 10602639, 21205278]

約数ペア:

[(1, 21205278), (2, 10602639), (3, 7068426), (6, 3534213), (9, 2356142), (18, 1178071), (43, 493146), (86, 246573), (129, 164382), (258, 82191), (387, 54794), (774, 27397)]