20966253

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1$

素因数の和:338

約数の個数: 64

約数和(自身を含む): 38983680

約数和(自身を除く): 18017427

約数列:

[1, 3, 7, 11, 17, 19, 21, 33, 51, 57, 77, 119, 133, 187, 209, 231, 281, 323, 357, 399, 561, 627, 843, 969, 1309, 1463, 1967, 2261, 3091, 3553, 3927, 4389, 4777, 5339, 5901, 6783, 9273, 10659, 14331, 16017, 21637, 24871, 33439, 37373, 52547, 58729, 64911, 74613, 90763, 100317, 112119, 157641, 176187, 272289, 367829, 411103, 635341, 998393, 1103487, 1233309, 1906023, 2995179, 6988751, 20966253]

約数ペア:

[(1, 20966253), (3, 6988751), (7, 2995179), (11, 1906023), (17, 1233309), (19, 1103487), (21, 998393), (33, 635341), (51, 411103), (57, 367829), (77, 272289), (119, 176187), (133, 157641), (187, 112119), (209, 100317), (231, 90763), (281, 74613), (323, 64911), (357, 58729), (399, 52547), (561, 37373), (627, 33439), (843, 24871), (969, 21637), (1309, 16017), (1463, 14331), (1967, 10659), (2261, 9273), (3091, 6783), (3553, 5901), (3927, 5339), (4389, 4777)]