20798000

素因数分解:

$2^4\times 5^3\times {\mathrm{10399}}^1$

素因数の和:10422

約数の個数: 40

約数和(自身を含む): 50294400

約数和(自身を除く): 29496400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10399, 20798, 41596, 51995, 83192, 103990, 166384, 207980, 259975, 415960, 519950, 831920, 1039900, 1299875, 2079800, 2599750, 4159600, 5199500, 10399000, 20798000]

約数ペア:

[(1, 20798000), (2, 10399000), (4, 5199500), (5, 4159600), (8, 2599750), (10, 2079800), (16, 1299875), (20, 1039900), (25, 831920), (40, 519950), (50, 415960), (80, 259975), (100, 207980), (125, 166384), (200, 103990), (250, 83192), (400, 51995), (500, 41596), (1000, 20798), (2000, 10399)]