20696871

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:136

約数の個数: 64

約数和(自身を含む): 34836480

約数和(自身を除く): 14139609

約数列:

[1, 3, 13, 17, 19, 31, 39, 51, 53, 57, 93, 159, 221, 247, 323, 403, 527, 589, 663, 689, 741, 901, 969, 1007, 1209, 1581, 1643, 1767, 2067, 2703, 3021, 4199, 4929, 6851, 7657, 10013, 11713, 12597, 13091, 17119, 20553, 21359, 22971, 27931, 30039, 31217, 35139, 39273, 51357, 64077, 83793, 93651, 130169, 222547, 363103, 390507, 405821, 530689, 667641, 1089309, 1217463, 1592067, 6898957, 20696871]

約数ペア:

[(1, 20696871), (3, 6898957), (13, 1592067), (17, 1217463), (19, 1089309), (31, 667641), (39, 530689), (51, 405821), (53, 390507), (57, 363103), (93, 222547), (159, 130169), (221, 93651), (247, 83793), (323, 64077), (403, 51357), (527, 39273), (589, 35139), (663, 31217), (689, 30039), (741, 27931), (901, 22971), (969, 21359), (1007, 20553), (1209, 17119), (1581, 13091), (1643, 12597), (1767, 11713), (2067, 10013), (2703, 7657), (3021, 6851), (4199, 4929)]