215522680

素因数分解:

$2^3\times 5^1\times {\mathrm{991}}^1\times {\mathrm{5437}}^1$

素因数の和:6439

約数の個数: 32

約数和(自身を含む): 485504640

約数和(自身を除く): 269981960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 991, 1982, 3964, 4955, 5437, 7928, 9910, 10874, 19820, 21748, 27185, 39640, 43496, 54370, 108740, 217480, 5388067, 10776134, 21552268, 26940335, 43104536, 53880670, 107761340, 215522680]

約数ペア:

[(1, 215522680), (2, 107761340), (4, 53880670), (5, 43104536), (8, 26940335), (10, 21552268), (20, 10776134), (40, 5388067), (991, 217480), (1982, 108740), (3964, 54370), (4955, 43496), (5437, 39640), (7928, 27185), (9910, 21748), (10874, 19820)]