18978260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{135559}}^1$

素因数の和:135575

約数の個数: 24

約数和(自身を含む): 45548160

約数和(自身を除く): 26569900

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 135559, 271118, 542236, 677795, 948913, 1355590, 1897826, 2711180, 3795652, 4744565, 9489130, 18978260]

約数ペア:

[(1, 18978260), (2, 9489130), (4, 4744565), (5, 3795652), (7, 2711180), (10, 1897826), (14, 1355590), (20, 948913), (28, 677795), (35, 542236), (70, 271118), (140, 135559)]