17958520

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{197}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 42340320

約数和(自身を除く): 24381800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 53, 86, 106, 172, 197, 212, 215, 265, 344, 394, 424, 430, 530, 788, 860, 985, 1060, 1576, 1720, 1970, 2120, 2279, 3940, 4558, 7880, 8471, 9116, 10441, 11395, 16942, 18232, 20882, 22790, 33884, 41764, 42355, 45580, 52205, 67768, 83528, 84710, 91160, 104410, 169420, 208820, 338840, 417640, 448963, 897926, 1795852, 2244815, 3591704, 4489630, 8979260, 17958520]

約数ペア:

[(1, 17958520), (2, 8979260), (4, 4489630), (5, 3591704), (8, 2244815), (10, 1795852), (20, 897926), (40, 448963), (43, 417640), (53, 338840), (86, 208820), (106, 169420), (172, 104410), (197, 91160), (212, 84710), (215, 83528), (265, 67768), (344, 52205), (394, 45580), (424, 42355), (430, 41764), (530, 33884), (788, 22790), (860, 20882), (985, 18232), (1060, 16942), (1576, 11395), (1720, 10441), (1970, 9116), (2120, 8471), (2279, 7880), (3940, 4558)]