81982400

素因数分解:

$2^6\times 5^2\times {\mathrm{51239}}^1$

素因数の和:51261

約数の個数: 42

約数和(自身を含む): 201731880

約数和(自身を除く): 119749480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 160, 200, 320, 400, 800, 1600, 51239, 102478, 204956, 256195, 409912, 512390, 819824, 1024780, 1280975, 1639648, 2049560, 2561950, 3279296, 4099120, 5123900, 8198240, 10247800, 16396480, 20495600, 40991200, 81982400]

約数ペア:

[(1, 81982400), (2, 40991200), (4, 20495600), (5, 16396480), (8, 10247800), (10, 8198240), (16, 5123900), (20, 4099120), (25, 3279296), (32, 2561950), (40, 2049560), (50, 1639648), (64, 1280975), (80, 1024780), (100, 819824), (160, 512390), (200, 409912), (320, 256195), (400, 204956), (800, 102478), (1600, 51239)]