19898000

素因数分解:

$2^4\times 5^3\times {\mathrm{9949}}^1$

素因数の和:9972

約数の個数: 40

約数和(自身を含む): 48118200

約数和(自身を除く): 28220200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 9949, 19898, 39796, 49745, 79592, 99490, 159184, 198980, 248725, 397960, 497450, 795920, 994900, 1243625, 1989800, 2487250, 3979600, 4974500, 9949000, 19898000]

約数ペア:

[(1, 19898000), (2, 9949000), (4, 4974500), (5, 3979600), (8, 2487250), (10, 1989800), (16, 1243625), (20, 994900), (25, 795920), (40, 497450), (50, 397960), (80, 248725), (100, 198980), (125, 159184), (200, 99490), (250, 79592), (400, 49745), (500, 39796), (1000, 19898), (2000, 9949)]