388631240

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{24473}}^1$

素因数の和:24881

約数の個数: 32

約数和(自身を含む): 876658680

約数和(自身を除く): 488027440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 15880, 24473, 48946, 97892, 122365, 195784, 244730, 489460, 978920, 9715781, 19431562, 38863124, 48578905, 77726248, 97157810, 194315620, 388631240]

約数ペア:

[(1, 388631240), (2, 194315620), (4, 97157810), (5, 77726248), (8, 48578905), (10, 38863124), (20, 19431562), (40, 9715781), (397, 978920), (794, 489460), (1588, 244730), (1985, 195784), (3176, 122365), (3970, 97892), (7940, 48946), (15880, 24473)]