1400650

素因数分解:

$2^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:378

約数の個数: 24

約数和(自身を含む): 2639340

約数和(自身を除く): 1238690

約数列:

[1, 2, 5, 10, 25, 50, 109, 218, 257, 514, 545, 1090, 1285, 2570, 2725, 5450, 6425, 12850, 28013, 56026, 140065, 280130, 700325, 1400650]

約数ペア:

[(1, 1400650), (2, 700325), (5, 280130), (10, 140065), (25, 56026), (50, 28013), (109, 12850), (218, 6425), (257, 5450), (514, 2725), (545, 2570), (1090, 1285)]