20210000

素因数分解:

$2^4\times 5^4\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:118

約数の個数: 100

約数和(自身を含む): 51133632

約数和(自身を除く): 30923632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 43, 47, 50, 80, 86, 94, 100, 125, 172, 188, 200, 215, 235, 250, 344, 376, 400, 430, 470, 500, 625, 688, 752, 860, 940, 1000, 1075, 1175, 1250, 1720, 1880, 2000, 2021, 2150, 2350, 2500, 3440, 3760, 4042, 4300, 4700, 5000, 5375, 5875, 8084, 8600, 9400, 10000, 10105, 10750, 11750, 16168, 17200, 18800, 20210, 21500, 23500, 26875, 29375, 32336, 40420, 43000, 47000, 50525, 53750, 58750, 80840, 86000, 94000, 101050, 107500, 117500, 161680, 202100, 215000, 235000, 252625, 404200, 430000, 470000, 505250, 808400, 1010500, 1263125, 2021000, 2526250, 4042000, 5052500, 10105000, 20210000]

約数ペア:

[(1, 20210000), (2, 10105000), (4, 5052500), (5, 4042000), (8, 2526250), (10, 2021000), (16, 1263125), (20, 1010500), (25, 808400), (40, 505250), (43, 470000), (47, 430000), (50, 404200), (80, 252625), (86, 235000), (94, 215000), (100, 202100), (125, 161680), (172, 117500), (188, 107500), (200, 101050), (215, 94000), (235, 86000), (250, 80840), (344, 58750), (376, 53750), (400, 50525), (430, 47000), (470, 43000), (500, 40420), (625, 32336), (688, 29375), (752, 26875), (860, 23500), (940, 21500), (1000, 20210), (1075, 18800), (1175, 17200), (1250, 16168), (1720, 11750), (1880, 10750), (2000, 10105), (2021, 10000), (2150, 9400), (2350, 8600), (2500, 8084), (3440, 5875), (3760, 5375), (4042, 5000), (4300, 4700)]