20780900

素因数分解:

$2^2\times 5^2\times 7^2\times {\mathrm{4241}}^1$

素因数の和:4269

約数の個数: 54

約数和(自身を含む): 52469298

約数和(自身を除く): 31688398

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 49, 50, 70, 98, 100, 140, 175, 196, 245, 350, 490, 700, 980, 1225, 2450, 4241, 4900, 8482, 16964, 21205, 29687, 42410, 59374, 84820, 106025, 118748, 148435, 207809, 212050, 296870, 415618, 424100, 593740, 742175, 831236, 1039045, 1484350, 2078090, 2968700, 4156180, 5195225, 10390450, 20780900]

約数ペア:

[(1, 20780900), (2, 10390450), (4, 5195225), (5, 4156180), (7, 2968700), (10, 2078090), (14, 1484350), (20, 1039045), (25, 831236), (28, 742175), (35, 593740), (49, 424100), (50, 415618), (70, 296870), (98, 212050), (100, 207809), (140, 148435), (175, 118748), (196, 106025), (245, 84820), (350, 59374), (490, 42410), (700, 29687), (980, 21205), (1225, 16964), (2450, 8482), (4241, 4900)]