18885867

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{331}}^1$

素因数の和:384

約数の個数: 64

約数和(自身を含む): 35696640

約数和(自身を除く): 16810773

約数列:

[1, 3, 7, 11, 13, 19, 21, 33, 39, 57, 77, 91, 133, 143, 209, 231, 247, 273, 331, 399, 429, 627, 741, 993, 1001, 1463, 1729, 2317, 2717, 3003, 3641, 4303, 4389, 5187, 6289, 6951, 8151, 10923, 12909, 18867, 19019, 25487, 30121, 44023, 47333, 57057, 69179, 76461, 81757, 90363, 132069, 141999, 207537, 245271, 331331, 484253, 572299, 899327, 993993, 1452759, 1716897, 2697981, 6295289, 18885867]

約数ペア:

[(1, 18885867), (3, 6295289), (7, 2697981), (11, 1716897), (13, 1452759), (19, 993993), (21, 899327), (33, 572299), (39, 484253), (57, 331331), (77, 245271), (91, 207537), (133, 141999), (143, 132069), (209, 90363), (231, 81757), (247, 76461), (273, 69179), (331, 57057), (399, 47333), (429, 44023), (627, 30121), (741, 25487), (993, 19019), (1001, 18867), (1463, 12909), (1729, 10923), (2317, 8151), (2717, 6951), (3003, 6289), (3641, 5187), (4303, 4389)]