78760400

素因数分解:

$2^4\times 5^2\times {\mathrm{196901}}^1$

素因数の和:196919

約数の個数: 30

約数和(自身を含む): 189222822

約数和(自身を除く): 110462422

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 196901, 393802, 787604, 984505, 1575208, 1969010, 3150416, 3938020, 4922525, 7876040, 9845050, 15752080, 19690100, 39380200, 78760400]

約数ペア:

[(1, 78760400), (2, 39380200), (4, 19690100), (5, 15752080), (8, 9845050), (10, 7876040), (16, 4922525), (20, 3938020), (25, 3150416), (40, 1969010), (50, 1575208), (80, 984505), (100, 787604), (200, 393802), (400, 196901)]