19889181

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{389}}^1$

素因数の和:450

約数の個数: 48

約数和(自身を含む): 34070400

約数和(自身を除く): 14181219

約数列:

[1, 3, 9, 13, 19, 23, 39, 57, 69, 117, 171, 207, 247, 299, 389, 437, 741, 897, 1167, 1311, 2223, 2691, 3501, 3933, 5057, 5681, 7391, 8947, 15171, 17043, 22173, 26841, 45513, 51129, 66519, 80523, 96083, 116311, 169993, 288249, 348933, 509979, 864747, 1046799, 1529937, 2209909, 6629727, 19889181]

約数ペア:

[(1, 19889181), (3, 6629727), (9, 2209909), (13, 1529937), (19, 1046799), (23, 864747), (39, 509979), (57, 348933), (69, 288249), (117, 169993), (171, 116311), (207, 96083), (247, 80523), (299, 66519), (389, 51129), (437, 45513), (741, 26841), (897, 22173), (1167, 17043), (1311, 15171), (2223, 8947), (2691, 7391), (3501, 5681), (3933, 5057)]