21689864

素因数分解:

$2^3\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2467}}^1$

素因数の和:2637

約数の個数: 32

約数和(自身を含む): 46793280

約数和(自身を除く): 25103416

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 157, 314, 628, 1099, 1256, 2198, 2467, 4396, 4934, 8792, 9868, 17269, 19736, 34538, 69076, 138152, 387319, 774638, 1549276, 2711233, 3098552, 5422466, 10844932, 21689864]

約数ペア:

[(1, 21689864), (2, 10844932), (4, 5422466), (7, 3098552), (8, 2711233), (14, 1549276), (28, 774638), (56, 387319), (157, 138152), (314, 69076), (628, 34538), (1099, 19736), (1256, 17269), (2198, 9868), (2467, 8792), (4396, 4934)]