19968400

素因数分解:

$2^4\times 5^2\times {\mathrm{49921}}^1$

素因数の和:49939

約数の個数: 30

約数和(自身を含む): 47975042

約数和(自身を除く): 28006642

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 49921, 99842, 199684, 249605, 399368, 499210, 798736, 998420, 1248025, 1996840, 2496050, 3993680, 4992100, 9984200, 19968400]

約数ペア:

[(1, 19968400), (2, 9984200), (4, 4992100), (5, 3993680), (8, 2496050), (10, 1996840), (16, 1248025), (20, 998420), (25, 798736), (40, 499210), (50, 399368), (80, 249605), (100, 199684), (200, 99842), (400, 49921)]