20297385

素因数分解:

$3^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{2179}}^1$

素因数の和:2219

約数の個数: 40

約数和(自身を含む): 37984320

約数和(自身を除く): 17686935

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 345, 405, 621, 1035, 1863, 2179, 3105, 6537, 9315, 10895, 19611, 32685, 50117, 58833, 98055, 150351, 176499, 250585, 294165, 451053, 751755, 882495, 1353159, 2255265, 4059477, 6765795, 20297385]

約数ペア:

[(1, 20297385), (3, 6765795), (5, 4059477), (9, 2255265), (15, 1353159), (23, 882495), (27, 751755), (45, 451053), (69, 294165), (81, 250585), (115, 176499), (135, 150351), (207, 98055), (345, 58833), (405, 50117), (621, 32685), (1035, 19611), (1863, 10895), (2179, 9315), (3105, 6537)]