20707785

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1289}}^1$

素因数の和:1327

約数の個数: 64

約数和(自身を含む): 44582400

約数和(自身を除く): 23874615

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 27, 35, 45, 51, 63, 85, 105, 119, 135, 153, 189, 255, 315, 357, 459, 595, 765, 945, 1071, 1289, 1785, 2295, 3213, 3867, 5355, 6445, 9023, 11601, 16065, 19335, 21913, 27069, 34803, 45115, 58005, 65739, 81207, 109565, 135345, 153391, 174015, 197217, 243621, 328695, 406035, 460173, 591651, 766955, 986085, 1218105, 1380519, 2300865, 2958255, 4141557, 6902595, 20707785]

約数ペア:

[(1, 20707785), (3, 6902595), (5, 4141557), (7, 2958255), (9, 2300865), (15, 1380519), (17, 1218105), (21, 986085), (27, 766955), (35, 591651), (45, 460173), (51, 406035), (63, 328695), (85, 243621), (105, 197217), (119, 174015), (135, 153391), (153, 135345), (189, 109565), (255, 81207), (315, 65739), (357, 58005), (459, 45115), (595, 34803), (765, 27069), (945, 21913), (1071, 19335), (1289, 16065), (1785, 11601), (2295, 9023), (3213, 6445), (3867, 5355)]