18997265

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{17509}}^1$

素因数の和:17552

約数の個数: 16

約数和(自身を含む): 26895360

約数和(自身を除く): 7898095

約数列:

[1, 5, 7, 31, 35, 155, 217, 1085, 17509, 87545, 122563, 542779, 612815, 2713895, 3799453, 18997265]

約数ペア:

[(1, 18997265), (5, 3799453), (7, 2713895), (31, 612815), (35, 542779), (155, 122563), (217, 87545), (1085, 17509)]