289540040

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{18233}}^1$

素因数の和:18641

約数の個数: 32

約数和(自身を含む): 653141880

約数和(自身を除く): 363601840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 7940, 15880, 18233, 36466, 72932, 91165, 145864, 182330, 364660, 729320, 7238501, 14477002, 28954004, 36192505, 57908008, 72385010, 144770020, 289540040]

約数ペア:

[(1, 289540040), (2, 144770020), (4, 72385010), (5, 57908008), (8, 36192505), (10, 28954004), (20, 14477002), (40, 7238501), (397, 729320), (794, 364660), (1588, 182330), (1985, 145864), (3176, 91165), (3970, 72932), (7940, 36466), (15880, 18233)]