21001071

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1789}}^1$

素因数の和:1855

約数の個数: 32

約数和(自身を含む): 35284480

約数和(自身を除く): 14283409

約数列:

[1, 3, 7, 13, 21, 39, 43, 91, 129, 273, 301, 559, 903, 1677, 1789, 3913, 5367, 11739, 12523, 23257, 37569, 69771, 76927, 162799, 230781, 488397, 538489, 1000051, 1615467, 3000153, 7000357, 21001071]

約数ペア:

[(1, 21001071), (3, 7000357), (7, 3000153), (13, 1615467), (21, 1000051), (39, 538489), (43, 488397), (91, 230781), (129, 162799), (273, 76927), (301, 69771), (559, 37569), (903, 23257), (1677, 12523), (1789, 11739), (3913, 5367)]