20554000

素因数分解:

$2^4\times 5^3\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:305

約数の個数: 80

約数和(自身を含む): 51068160

約数和(自身を除く): 30514160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 43, 50, 80, 86, 100, 125, 172, 200, 215, 239, 250, 344, 400, 430, 478, 500, 688, 860, 956, 1000, 1075, 1195, 1720, 1912, 2000, 2150, 2390, 3440, 3824, 4300, 4780, 5375, 5975, 8600, 9560, 10277, 10750, 11950, 17200, 19120, 20554, 21500, 23900, 29875, 41108, 43000, 47800, 51385, 59750, 82216, 86000, 95600, 102770, 119500, 164432, 205540, 239000, 256925, 411080, 478000, 513850, 822160, 1027700, 1284625, 2055400, 2569250, 4110800, 5138500, 10277000, 20554000]

約数ペア:

[(1, 20554000), (2, 10277000), (4, 5138500), (5, 4110800), (8, 2569250), (10, 2055400), (16, 1284625), (20, 1027700), (25, 822160), (40, 513850), (43, 478000), (50, 411080), (80, 256925), (86, 239000), (100, 205540), (125, 164432), (172, 119500), (200, 102770), (215, 95600), (239, 86000), (250, 82216), (344, 59750), (400, 51385), (430, 47800), (478, 43000), (500, 41108), (688, 29875), (860, 23900), (956, 21500), (1000, 20554), (1075, 19120), (1195, 17200), (1720, 11950), (1912, 10750), (2000, 10277), (2150, 9560), (2390, 8600), (3440, 5975), (3824, 5375), (4300, 4780)]