169420

素因数分解:

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

素因数の和:249

約数の個数: 24

約数和(自身を含む): 365904

約数和(自身を除く): 196484

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 197, 215, 394, 430, 788, 860, 985, 1970, 3940, 8471, 16942, 33884, 42355, 84710, 169420]

約数ペア:

[(1, 169420), (2, 84710), (4, 42355), (5, 33884), (10, 16942), (20, 8471), (43, 3940), (86, 1970), (172, 985), (197, 860), (215, 788), (394, 430)]