20708499

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 36495360

約数和(自身を除く): 15786861

約数列:

[1, 3, 7, 17, 19, 21, 43, 51, 57, 71, 119, 129, 133, 213, 301, 323, 357, 399, 497, 731, 817, 903, 969, 1207, 1349, 1491, 2193, 2261, 2451, 3053, 3621, 4047, 5117, 5719, 6783, 8449, 9159, 9443, 13889, 15351, 17157, 21371, 22933, 25347, 28329, 41667, 51901, 58007, 64113, 68799, 97223, 155703, 160531, 174021, 291669, 363307, 406049, 481593, 986119, 1089921, 1218147, 2958357, 6902833, 20708499]

約数ペア:

[(1, 20708499), (3, 6902833), (7, 2958357), (17, 1218147), (19, 1089921), (21, 986119), (43, 481593), (51, 406049), (57, 363307), (71, 291669), (119, 174021), (129, 160531), (133, 155703), (213, 97223), (301, 68799), (323, 64113), (357, 58007), (399, 51901), (497, 41667), (731, 28329), (817, 25347), (903, 22933), (969, 21371), (1207, 17157), (1349, 15351), (1491, 13889), (2193, 9443), (2261, 9159), (2451, 8449), (3053, 6783), (3621, 5719), (4047, 5117)]