212990309

素因数分解:

$7^4\times {\mathrm{43}}^1\times {\mathrm{2063}}^1$

素因数の和:2134

約数の個数: 20

約数和(自身を含む): 254375616

約数和(自身を除く): 41385307

約数列:

[1, 7, 43, 49, 301, 343, 2063, 2107, 2401, 14441, 14749, 88709, 101087, 103243, 620963, 707609, 4346741, 4953263, 30427187, 212990309]

約数ペア:

[(1, 212990309), (7, 30427187), (43, 4953263), (49, 4346741), (301, 707609), (343, 620963), (2063, 103243), (2107, 101087), (2401, 88709), (14441, 14749)]