338840

素因数分解:

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

素因数の和:251

約数の個数: 32

約数和(自身を含む): 784080

約数和(自身を除く): 445240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 197, 215, 344, 394, 430, 788, 860, 985, 1576, 1720, 1970, 3940, 7880, 8471, 16942, 33884, 42355, 67768, 84710, 169420, 338840]

約数ペア:

[(1, 338840), (2, 169420), (4, 84710), (5, 67768), (8, 42355), (10, 33884), (20, 16942), (40, 8471), (43, 7880), (86, 3940), (172, 1970), (197, 1720), (215, 1576), (344, 985), (394, 860), (430, 788)]