18806985

素因数分解:

$3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{673}}^1$

素因数の和:716

約数の個数: 48

約数和(自身を含む): 35328384

約数和(自身を除く): 16521399

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 345, 405, 621, 673, 1035, 1215, 1863, 2019, 3105, 3365, 5589, 6057, 9315, 10095, 15479, 18171, 27945, 30285, 46437, 54513, 77395, 90855, 139311, 163539, 232185, 272565, 417933, 696555, 817695, 1253799, 2089665, 3761397, 6268995, 18806985]

約数ペア:

[(1, 18806985), (3, 6268995), (5, 3761397), (9, 2089665), (15, 1253799), (23, 817695), (27, 696555), (45, 417933), (69, 272565), (81, 232185), (115, 163539), (135, 139311), (207, 90855), (243, 77395), (345, 54513), (405, 46437), (621, 30285), (673, 27945), (1035, 18171), (1215, 15479), (1863, 10095), (2019, 9315), (3105, 6057), (3365, 5589)]