19948000

素因数分解:

$2^5\times 5^3\times {\mathrm{4987}}^1$

素因数の和:5012

約数の個数: 48

約数和(自身を含む): 49022064

約数和(自身を除く): 29074064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 4987, 9974, 19948, 24935, 39896, 49870, 79792, 99740, 124675, 159584, 199480, 249350, 398960, 498700, 623375, 797920, 997400, 1246750, 1994800, 2493500, 3989600, 4987000, 9974000, 19948000]

約数ペア:

[(1, 19948000), (2, 9974000), (4, 4987000), (5, 3989600), (8, 2493500), (10, 1994800), (16, 1246750), (20, 997400), (25, 797920), (32, 623375), (40, 498700), (50, 398960), (80, 249350), (100, 199480), (125, 159584), (160, 124675), (200, 99740), (250, 79792), (400, 49870), (500, 39896), (800, 24935), (1000, 19948), (2000, 9974), (4000, 4987)]