21687876

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{967}}^1$

素因数の和:1073

約数の個数: 72

約数和(自身を含む): 63423360

約数和(自身を除く): 41735484

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 89, 126, 178, 252, 267, 356, 534, 623, 801, 967, 1068, 1246, 1602, 1869, 1934, 2492, 2901, 3204, 3738, 3868, 5607, 5802, 6769, 7476, 8703, 11214, 11604, 13538, 17406, 20307, 22428, 27076, 34812, 40614, 60921, 81228, 86063, 121842, 172126, 243684, 258189, 344252, 516378, 602441, 774567, 1032756, 1204882, 1549134, 1807323, 2409764, 3098268, 3614646, 5421969, 7229292, 10843938, 21687876]

約数ペア:

[(1, 21687876), (2, 10843938), (3, 7229292), (4, 5421969), (6, 3614646), (7, 3098268), (9, 2409764), (12, 1807323), (14, 1549134), (18, 1204882), (21, 1032756), (28, 774567), (36, 602441), (42, 516378), (63, 344252), (84, 258189), (89, 243684), (126, 172126), (178, 121842), (252, 86063), (267, 81228), (356, 60921), (534, 40614), (623, 34812), (801, 27076), (967, 22428), (1068, 20307), (1246, 17406), (1602, 13538), (1869, 11604), (1934, 11214), (2492, 8703), (2901, 7476), (3204, 6769), (3738, 5802), (3868, 5607)]