199778840

素因数分解:

$2^3\times 5^1\times {\mathrm{4994471}}^1$

素因数の和:4994482

約数の個数: 16

約数和(自身を含む): 449502480

約数和(自身を除く): 249723640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4994471, 9988942, 19977884, 24972355, 39955768, 49944710, 99889420, 199778840]

約数ペア:

[(1, 199778840), (2, 99889420), (4, 49944710), (5, 39955768), (8, 24972355), (10, 19977884), (20, 9988942), (40, 4994471)]