20355205

素因数分解:

$5^1\times {\mathrm{13}}^3\times {\mathrm{17}}^1\times {\mathrm{109}}^1$

素因数の和:170

約数の個数: 32

約数和(自身を含む): 28274400

約数和(自身を除く): 7919195

約数列:

[1, 5, 13, 17, 65, 85, 109, 169, 221, 545, 845, 1105, 1417, 1853, 2197, 2873, 7085, 9265, 10985, 14365, 18421, 24089, 37349, 92105, 120445, 186745, 239473, 313157, 1197365, 1565785, 4071041, 20355205]

約数ペア:

[(1, 20355205), (5, 4071041), (13, 1565785), (17, 1197365), (65, 313157), (85, 239473), (109, 186745), (169, 120445), (221, 92105), (545, 37349), (845, 24089), (1105, 18421), (1417, 14365), (1853, 10985), (2197, 9265), (2873, 7085)]