20171788

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{367}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 43853824

約数和(自身を除く): 23682036

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 151, 182, 302, 364, 367, 604, 734, 1057, 1468, 1963, 2114, 2569, 3926, 4228, 4771, 5138, 7852, 9542, 10276, 13741, 19084, 27482, 33397, 54964, 55417, 66794, 110834, 133588, 221668, 387919, 720421, 775838, 1440842, 1551676, 2881684, 5042947, 10085894, 20171788]

約数ペア:

[(1, 20171788), (2, 10085894), (4, 5042947), (7, 2881684), (13, 1551676), (14, 1440842), (26, 775838), (28, 720421), (52, 387919), (91, 221668), (151, 133588), (182, 110834), (302, 66794), (364, 55417), (367, 54964), (604, 33397), (734, 27482), (1057, 19084), (1468, 13741), (1963, 10276), (2114, 9542), (2569, 7852), (3926, 5138), (4228, 4771)]