397360400

素因数分解:

$2^4\times 5^2\times {\mathrm{993401}}^1$

素因数の和:993419

約数の個数: 30

約数和(自身を含む): 954659322

約数和(自身を除く): 557298922

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 993401, 1986802, 3973604, 4967005, 7947208, 9934010, 15894416, 19868020, 24835025, 39736040, 49670050, 79472080, 99340100, 198680200, 397360400]

約数ペア:

[(1, 397360400), (2, 198680200), (4, 99340100), (5, 79472080), (8, 49670050), (10, 39736040), (16, 24835025), (20, 19868020), (25, 15894416), (40, 9934010), (50, 7947208), (80, 4967005), (100, 3973604), (200, 1986802), (400, 993401)]