20909847

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{1583}}^1$

素因数の和:1647

約数の個数: 32

約数和(自身を含む): 34670592

約数和(自身を除く): 13760745

約数列:

[1, 3, 7, 17, 21, 37, 51, 111, 119, 259, 357, 629, 777, 1583, 1887, 4403, 4749, 11081, 13209, 26911, 33243, 58571, 80733, 175713, 188377, 409997, 565131, 995707, 1229991, 2987121, 6969949, 20909847]

約数ペア:

[(1, 20909847), (3, 6969949), (7, 2987121), (17, 1229991), (21, 995707), (37, 565131), (51, 409997), (111, 188377), (119, 175713), (259, 80733), (357, 58571), (629, 33243), (777, 26911), (1583, 13209), (1887, 11081), (4403, 4749)]