245840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{439}}^1$

素因数の和:459

約数の個数: 40

約数和(自身を含む): 654720

約数和(自身を除く): 408880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 439, 560, 878, 1756, 2195, 3073, 3512, 4390, 6146, 7024, 8780, 12292, 15365, 17560, 24584, 30730, 35120, 49168, 61460, 122920, 245840]

約数ペア:

[(1, 245840), (2, 122920), (4, 61460), (5, 49168), (7, 35120), (8, 30730), (10, 24584), (14, 17560), (16, 15365), (20, 12292), (28, 8780), (35, 7024), (40, 6146), (56, 4390), (70, 3512), (80, 3073), (112, 2195), (140, 1756), (280, 878), (439, 560)]