18407440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5351}}^1$

素因数の和:5407

約数の個数: 40

約数和(自身を含む): 43800768

約数和(自身を除く): 25393328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5351, 10702, 21404, 26755, 42808, 53510, 85616, 107020, 214040, 230093, 428080, 460186, 920372, 1150465, 1840744, 2300930, 3681488, 4601860, 9203720, 18407440]

約数ペア:

[(1, 18407440), (2, 9203720), (4, 4601860), (5, 3681488), (8, 2300930), (10, 1840744), (16, 1150465), (20, 920372), (40, 460186), (43, 428080), (80, 230093), (86, 214040), (172, 107020), (215, 85616), (344, 53510), (430, 42808), (688, 26755), (860, 21404), (1720, 10702), (3440, 5351)]