21490843

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{107}}^1$

素因数の和:199

約数の個数: 24

約数和(自身を含む): 25738560

約数和(自身を除く): 4247717

約数列:

[1, 11, 19, 31, 107, 209, 341, 589, 961, 1177, 2033, 3317, 6479, 10571, 18259, 22363, 36487, 63023, 102827, 200849, 693253, 1131097, 1953713, 21490843]

約数ペア:

[(1, 21490843), (11, 1953713), (19, 1131097), (31, 693253), (107, 200849), (209, 102827), (341, 63023), (589, 36487), (961, 22363), (1177, 18259), (2033, 10571), (3317, 6479)]