858638780

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{393871}}^1$

素因数の和:393989

約数の個数: 24

約数和(自身を含む): 1819688640

約数和(自身を除く): 961049860

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 393871, 787742, 1575484, 1969355, 3938710, 7877420, 42931939, 85863878, 171727756, 214659695, 429319390, 858638780]

約数ペア:

[(1, 858638780), (2, 429319390), (4, 214659695), (5, 171727756), (10, 85863878), (20, 42931939), (109, 7877420), (218, 3938710), (436, 1969355), (545, 1575484), (1090, 787742), (2180, 393871)]