780020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{907}}^1$

素因数の和:959

約数の個数: 24

約数和(自身を含む): 1677984

約数和(自身を除く): 897964

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 907, 1814, 3628, 4535, 9070, 18140, 39001, 78002, 156004, 195005, 390010, 780020]

約数ペア:

[(1, 780020), (2, 390010), (4, 195005), (5, 156004), (10, 78002), (20, 39001), (43, 18140), (86, 9070), (172, 4535), (215, 3628), (430, 1814), (860, 907)]