18778738

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:354

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 13154702

約数列:

[1, 2, 11, 22, 41, 82, 109, 191, 218, 382, 451, 902, 1199, 2101, 2398, 4202, 4469, 7831, 8938, 15662, 20819, 41638, 49159, 86141, 98318, 172282, 229009, 458018, 853579, 1707158, 9389369, 18778738]

約数ペア:

[(1, 18778738), (2, 9389369), (11, 1707158), (22, 853579), (41, 458018), (82, 229009), (109, 172282), (191, 98318), (218, 86141), (382, 49159), (451, 41638), (902, 20819), (1199, 15662), (2101, 8938), (2398, 7831), (4202, 4469)]