20862009

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:227

約数の個数: 64

約数和(自身を含む): 38522880

約数和(自身を除く): 17660871

約数列:

[1, 3, 7, 9, 17, 21, 27, 43, 51, 63, 119, 129, 151, 153, 189, 301, 357, 387, 453, 459, 731, 903, 1057, 1071, 1161, 1359, 2193, 2567, 2709, 3171, 3213, 4077, 5117, 6493, 6579, 7701, 8127, 9513, 15351, 17969, 19479, 19737, 23103, 28539, 45451, 46053, 53907, 58437, 69309, 110381, 136353, 138159, 161721, 175311, 331143, 409059, 485163, 772667, 993429, 1227177, 2318001, 2980287, 6954003, 20862009]

約数ペア:

[(1, 20862009), (3, 6954003), (7, 2980287), (9, 2318001), (17, 1227177), (21, 993429), (27, 772667), (43, 485163), (51, 409059), (63, 331143), (119, 175311), (129, 161721), (151, 138159), (153, 136353), (189, 110381), (301, 69309), (357, 58437), (387, 53907), (453, 46053), (459, 45451), (731, 28539), (903, 23103), (1057, 19737), (1071, 19479), (1161, 17969), (1359, 15351), (2193, 9513), (2567, 8127), (2709, 7701), (3171, 6579), (3213, 6493), (4077, 5117)]