21317956

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{15629}}^1$

素因数の和:15675

約数の個数: 24

約数和(自身を含む): 42013440

約数和(自身を除く): 20695484

約数列:

[1, 2, 4, 11, 22, 31, 44, 62, 124, 341, 682, 1364, 15629, 31258, 62516, 171919, 343838, 484499, 687676, 968998, 1937996, 5329489, 10658978, 21317956]

約数ペア:

[(1, 21317956), (2, 10658978), (4, 5329489), (11, 1937996), (22, 968998), (31, 687676), (44, 484499), (62, 343838), (124, 171919), (341, 62516), (682, 31258), (1364, 15629)]