28121457

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{431}}^1$

素因数の和:693

約数の個数: 32

約数和(自身を含む): 46448640

約数和(自身を除く): 18327183

約数列:

[1, 3, 7, 13, 21, 39, 91, 239, 273, 431, 717, 1293, 1673, 3017, 3107, 5019, 5603, 9051, 9321, 16809, 21749, 39221, 65247, 103009, 117663, 309027, 721063, 1339117, 2163189, 4017351, 9373819, 28121457]

約数ペア:

[(1, 28121457), (3, 9373819), (7, 4017351), (13, 2163189), (21, 1339117), (39, 721063), (91, 309027), (239, 117663), (273, 103009), (431, 65247), (717, 39221), (1293, 21749), (1673, 16809), (3017, 9321), (3107, 9051), (5019, 5603)]