20444800

素因数分解:

$2^7\times 5^2\times {\mathrm{6389}}^1$

素因数の和:6413

約数の個数: 48

約数和(自身を含む): 50512950

約数和(自身を除く): 30068150

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 320, 400, 640, 800, 1600, 3200, 6389, 12778, 25556, 31945, 51112, 63890, 102224, 127780, 159725, 204448, 255560, 319450, 408896, 511120, 638900, 817792, 1022240, 1277800, 2044480, 2555600, 4088960, 5111200, 10222400, 20444800]

約数ペア:

[(1, 20444800), (2, 10222400), (4, 5111200), (5, 4088960), (8, 2555600), (10, 2044480), (16, 1277800), (20, 1022240), (25, 817792), (32, 638900), (40, 511120), (50, 408896), (64, 319450), (80, 255560), (100, 204448), (128, 159725), (160, 127780), (200, 102224), (320, 63890), (400, 51112), (640, 31945), (800, 25556), (1600, 12778), (3200, 6389)]