20554989

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{103}}^1$

素因数の和:186

約数の個数: 64

約数和(自身を含む): 36900864

約数和(自身を除く): 16345875

約数列:

[1, 3, 7, 13, 17, 21, 39, 43, 51, 91, 103, 119, 129, 221, 273, 301, 309, 357, 559, 663, 721, 731, 903, 1339, 1547, 1677, 1751, 2163, 2193, 3913, 4017, 4429, 4641, 5117, 5253, 9373, 9503, 11739, 12257, 13287, 15351, 22763, 28119, 28509, 31003, 36771, 57577, 66521, 68289, 75293, 93009, 159341, 172731, 199563, 225879, 403039, 478023, 527051, 978809, 1209117, 1581153, 2936427, 6851663, 20554989]

約数ペア:

[(1, 20554989), (3, 6851663), (7, 2936427), (13, 1581153), (17, 1209117), (21, 978809), (39, 527051), (43, 478023), (51, 403039), (91, 225879), (103, 199563), (119, 172731), (129, 159341), (221, 93009), (273, 75293), (301, 68289), (309, 66521), (357, 57577), (559, 36771), (663, 31003), (721, 28509), (731, 28119), (903, 22763), (1339, 15351), (1547, 13287), (1677, 12257), (1751, 11739), (2163, 9503), (2193, 9373), (3913, 5253), (4017, 5117), (4429, 4641)]