21000391676

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{711299}}^1$

素因数の和:711386

約数の個数: 36

約数和(自身を含む): 41057658600

約数和(自身を除く): 20057266924

約数列:

[1, 2, 4, 11, 22, 44, 61, 121, 122, 242, 244, 484, 671, 1342, 2684, 7381, 14762, 29524, 711299, 1422598, 2845196, 7824289, 15648578, 31297156, 43389239, 86067179, 86778478, 172134358, 173556956, 344268716, 477281629, 954563258, 1909126516, 5250097919, 10500195838, 21000391676]

約数ペア:

[(1, 21000391676), (2, 10500195838), (4, 5250097919), (11, 1909126516), (22, 954563258), (44, 477281629), (61, 344268716), (121, 173556956), (122, 172134358), (242, 86778478), (244, 86067179), (484, 43389239), (671, 31297156), (1342, 15648578), (2684, 7824289), (7381, 2845196), (14762, 1422598), (29524, 711299)]