408400

素因数分解:

$2^4\times 5^2\times {\mathrm{1021}}^1$

素因数の和:1039

約数の個数: 30

約数和(自身を含む): 982142

約数和(自身を除く): 573742

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 1021, 2042, 4084, 5105, 8168, 10210, 16336, 20420, 25525, 40840, 51050, 81680, 102100, 204200, 408400]

約数ペア:

[(1, 408400), (2, 204200), (4, 102100), (5, 81680), (8, 51050), (10, 40840), (16, 25525), (20, 20420), (25, 16336), (40, 10210), (50, 8168), (80, 5105), (100, 4084), (200, 2042), (400, 1021)]