21075691

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{241}}^1$

素因数の和:323

約数の個数: 24

約数和(自身を含む): 26914272

約数和(自身を除く): 5838581

約数列:

[1, 7, 13, 31, 91, 217, 241, 403, 961, 1687, 2821, 3133, 6727, 7471, 12493, 21931, 52297, 87451, 97123, 231601, 679861, 1621207, 3010813, 21075691]

約数ペア:

[(1, 21075691), (7, 3010813), (13, 1621207), (31, 679861), (91, 231601), (217, 97123), (241, 87451), (403, 52297), (961, 21931), (1687, 12493), (2821, 7471), (3133, 6727)]