20853987

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{29}}^1\times {\mathrm{283}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 36261120

約数和(自身を除く): 15407133

約数列:

[1, 3, 7, 11, 21, 29, 33, 77, 87, 121, 203, 231, 283, 319, 363, 609, 847, 849, 957, 1981, 2233, 2541, 3113, 3509, 5943, 6699, 8207, 9339, 10527, 21791, 24563, 24621, 34243, 57449, 65373, 73689, 90277, 102729, 172347, 239701, 270831, 631939, 719103, 993047, 1895817, 2979141, 6951329, 20853987]

約数ペア:

[(1, 20853987), (3, 6951329), (7, 2979141), (11, 1895817), (21, 993047), (29, 719103), (33, 631939), (77, 270831), (87, 239701), (121, 172347), (203, 102729), (231, 90277), (283, 73689), (319, 65373), (363, 57449), (609, 34243), (847, 24621), (849, 24563), (957, 21791), (1981, 10527), (2233, 9339), (2541, 8207), (3113, 6699), (3509, 5943)]