389664260

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{140167}}^1$

素因数の和:140315

約数の個数: 24

約数和(自身を含む): 824187840

約数和(自身を除く): 434523580

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 140167, 280334, 560668, 700835, 1401670, 2803340, 19483213, 38966426, 77932852, 97416065, 194832130, 389664260]

約数ペア:

[(1, 389664260), (2, 194832130), (4, 97416065), (5, 77932852), (10, 38966426), (20, 19483213), (139, 2803340), (278, 1401670), (556, 700835), (695, 560668), (1390, 280334), (2780, 140167)]