51978800

素因数分解:

$2^4\times 5^2\times {\mathrm{199}}^1\times {\mathrm{653}}^1$

素因数の和:870

約数の個数: 60

約数和(自身を含む): 125698800

約数和(自身を除く): 73720000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 199, 200, 398, 400, 653, 796, 995, 1306, 1592, 1990, 2612, 3184, 3265, 3980, 4975, 5224, 6530, 7960, 9950, 10448, 13060, 15920, 16325, 19900, 26120, 32650, 39800, 52240, 65300, 79600, 129947, 130600, 259894, 261200, 519788, 649735, 1039576, 1299470, 2079152, 2598940, 3248675, 5197880, 6497350, 10395760, 12994700, 25989400, 51978800]

約数ペア:

[(1, 51978800), (2, 25989400), (4, 12994700), (5, 10395760), (8, 6497350), (10, 5197880), (16, 3248675), (20, 2598940), (25, 2079152), (40, 1299470), (50, 1039576), (80, 649735), (100, 519788), (199, 261200), (200, 259894), (398, 130600), (400, 129947), (653, 79600), (796, 65300), (995, 52240), (1306, 39800), (1592, 32650), (1990, 26120), (2612, 19900), (3184, 16325), (3265, 15920), (3980, 13060), (4975, 10448), (5224, 9950), (6530, 7960)]