21218380

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3671}}^1$

素因数の和:3714

約数の個数: 36

約数和(自身を含む): 47346768

約数和(自身を除く): 26128388

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 3671, 5780, 7342, 14684, 18355, 36710, 62407, 73420, 124814, 249628, 312035, 624070, 1060919, 1248140, 2121838, 4243676, 5304595, 10609190, 21218380]

約数ペア:

[(1, 21218380), (2, 10609190), (4, 5304595), (5, 4243676), (10, 2121838), (17, 1248140), (20, 1060919), (34, 624070), (68, 312035), (85, 249628), (170, 124814), (289, 73420), (340, 62407), (578, 36710), (1156, 18355), (1445, 14684), (2890, 7342), (3671, 5780)]