21788877

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:142

約数の個数: 48

約数和(自身を含む): 35112960

約数和(自身を除く): 13324083

約数列:

[1, 3, 11, 19, 31, 33, 57, 59, 93, 177, 209, 341, 361, 589, 627, 649, 1023, 1083, 1121, 1767, 1829, 1947, 3363, 3971, 5487, 6479, 11191, 11913, 12331, 19437, 20119, 21299, 33573, 34751, 36993, 60357, 63897, 104253, 123101, 234289, 369303, 382261, 660269, 702867, 1146783, 1980807, 7262959, 21788877]

約数ペア:

[(1, 21788877), (3, 7262959), (11, 1980807), (19, 1146783), (31, 702867), (33, 660269), (57, 382261), (59, 369303), (93, 234289), (177, 123101), (209, 104253), (341, 63897), (361, 60357), (589, 36993), (627, 34751), (649, 33573), (1023, 21299), (1083, 20119), (1121, 19437), (1767, 12331), (1829, 11913), (1947, 11191), (3363, 6479), (3971, 5487)]