18545215

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{1291}}^1$

素因数の和:1339

約数の個数: 24

約数和(自身を含む): 25535088

約数和(自身を除く): 6989873

約数列:

[1, 5, 13, 17, 65, 85, 169, 221, 845, 1105, 1291, 2873, 6455, 14365, 16783, 21947, 83915, 109735, 218179, 285311, 1090895, 1426555, 3709043, 18545215]

約数ペア:

[(1, 18545215), (5, 3709043), (13, 1426555), (17, 1090895), (65, 285311), (85, 218179), (169, 109735), (221, 83915), (845, 21947), (1105, 16783), (1291, 14365), (2873, 6455)]