21191982

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{137}}^1$

素因数の和:305

約数の個数: 64

約数和(自身を含む): 50872320

約数和(自身を除く): 29680338

約数列:

[1, 2, 3, 6, 7, 14, 21, 29, 42, 58, 87, 127, 137, 174, 203, 254, 274, 381, 406, 411, 609, 762, 822, 889, 959, 1218, 1778, 1918, 2667, 2877, 3683, 3973, 5334, 5754, 7366, 7946, 11049, 11919, 17399, 22098, 23838, 25781, 27811, 34798, 51562, 52197, 55622, 77343, 83433, 104394, 121793, 154686, 166866, 243586, 365379, 504571, 730758, 1009142, 1513713, 3027426, 3531997, 7063994, 10595991, 21191982]

約数ペア:

[(1, 21191982), (2, 10595991), (3, 7063994), (6, 3531997), (7, 3027426), (14, 1513713), (21, 1009142), (29, 730758), (42, 504571), (58, 365379), (87, 243586), (127, 166866), (137, 154686), (174, 121793), (203, 104394), (254, 83433), (274, 77343), (381, 55622), (406, 52197), (411, 51562), (609, 34798), (762, 27811), (822, 25781), (889, 23838), (959, 22098), (1218, 17399), (1778, 11919), (1918, 11049), (2667, 7946), (2877, 7366), (3683, 5754), (3973, 5334)]