28808080

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{7349}}^1$

素因数の和:7376

約数の個数: 60

約数和(自身を含む): 77924700

約数和(自身を除く): 49116620

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 7349, 14698, 29396, 36745, 51443, 58792, 73490, 102886, 117584, 146980, 205772, 257215, 293960, 360101, 411544, 514430, 587920, 720202, 823088, 1028860, 1440404, 1800505, 2057720, 2880808, 3601010, 4115440, 5761616, 7202020, 14404040, 28808080]

約数ペア:

[(1, 28808080), (2, 14404040), (4, 7202020), (5, 5761616), (7, 4115440), (8, 3601010), (10, 2880808), (14, 2057720), (16, 1800505), (20, 1440404), (28, 1028860), (35, 823088), (40, 720202), (49, 587920), (56, 514430), (70, 411544), (80, 360101), (98, 293960), (112, 257215), (140, 205772), (196, 146980), (245, 117584), (280, 102886), (392, 73490), (490, 58792), (560, 51443), (784, 36745), (980, 29396), (1960, 14698), (3920, 7349)]