20412678

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{643}}^1$

素因数の和:709

約数の個数: 64

約数和(自身を含む): 49335552

約数和(自身を除く): 28922874

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 37, 39, 66, 74, 78, 111, 143, 222, 286, 407, 429, 481, 643, 814, 858, 962, 1221, 1286, 1443, 1929, 2442, 2886, 3858, 5291, 7073, 8359, 10582, 14146, 15873, 16718, 21219, 23791, 25077, 31746, 42438, 47582, 50154, 71373, 91949, 142746, 183898, 261701, 275847, 309283, 523402, 551694, 618566, 785103, 927849, 1570206, 1855698, 3402113, 6804226, 10206339, 20412678]

約数ペア:

[(1, 20412678), (2, 10206339), (3, 6804226), (6, 3402113), (11, 1855698), (13, 1570206), (22, 927849), (26, 785103), (33, 618566), (37, 551694), (39, 523402), (66, 309283), (74, 275847), (78, 261701), (111, 183898), (143, 142746), (222, 91949), (286, 71373), (407, 50154), (429, 47582), (481, 42438), (643, 31746), (814, 25077), (858, 23791), (962, 21219), (1221, 16718), (1286, 15873), (1443, 14146), (1929, 10582), (2442, 8359), (2886, 7073), (3858, 5291)]