21605521

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{701}}^1$

素因数の和:769

約数の個数: 24

約数和(自身を含む): 27369576

約数和(自身を除く): 5764055

約数列:

[1, 7, 17, 37, 49, 119, 259, 629, 701, 833, 1813, 4403, 4907, 11917, 25937, 30821, 34349, 83419, 181559, 440929, 583933, 1270913, 3086503, 21605521]

約数ペア:

[(1, 21605521), (7, 3086503), (17, 1270913), (37, 583933), (49, 440929), (119, 181559), (259, 83419), (629, 34349), (701, 30821), (833, 25937), (1813, 11917), (4403, 4907)]