20676845

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:138

約数の個数: 64

約数和(自身を含む): 33177600

約数和(自身を除く): 12500755

約数列:

[1, 5, 7, 17, 19, 31, 35, 59, 85, 95, 119, 133, 155, 217, 295, 323, 413, 527, 589, 595, 665, 1003, 1085, 1121, 1615, 1829, 2065, 2261, 2635, 2945, 3689, 4123, 5015, 5605, 7021, 7847, 9145, 10013, 11305, 12803, 18445, 19057, 20615, 31093, 34751, 35105, 39235, 50065, 64015, 70091, 95285, 133399, 155465, 173755, 217651, 243257, 350455, 590767, 666995, 1088255, 1216285, 2953835, 4135369, 20676845]

約数ペア:

[(1, 20676845), (5, 4135369), (7, 2953835), (17, 1216285), (19, 1088255), (31, 666995), (35, 590767), (59, 350455), (85, 243257), (95, 217651), (119, 173755), (133, 155465), (155, 133399), (217, 95285), (295, 70091), (323, 64015), (413, 50065), (527, 39235), (589, 35105), (595, 34751), (665, 31093), (1003, 20615), (1085, 19057), (1121, 18445), (1615, 12803), (1829, 11305), (2065, 10013), (2261, 9145), (2635, 7847), (2945, 7021), (3689, 5605), (4123, 5015)]