1988894000

素因数分解:

$2^4\times 5^3\times {\mathrm{994447}}^1$

素因数の和:994470

約数の個数: 40

約数和(自身を含む): 4809150528

約数和(自身を除く): 2820256528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 994447, 1988894, 3977788, 4972235, 7955576, 9944470, 15911152, 19888940, 24861175, 39777880, 49722350, 79555760, 99444700, 124305875, 198889400, 248611750, 397778800, 497223500, 994447000, 1988894000]

約数ペア:

[(1, 1988894000), (2, 994447000), (4, 497223500), (5, 397778800), (8, 248611750), (10, 198889400), (16, 124305875), (20, 99444700), (25, 79555760), (40, 49722350), (50, 39777880), (80, 24861175), (100, 19888940), (125, 15911152), (200, 9944470), (250, 7955576), (400, 4972235), (500, 3977788), (1000, 1988894), (2000, 994447)]