857420

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{997}}^1$

素因数の和:1049

約数の個数: 24

約数和(自身を含む): 1844304

約数和(自身を除く): 986884

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 997, 1994, 3988, 4985, 9970, 19940, 42871, 85742, 171484, 214355, 428710, 857420]

約数ペア:

[(1, 857420), (2, 428710), (4, 214355), (5, 171484), (10, 85742), (20, 42871), (43, 19940), (86, 9970), (172, 4985), (215, 3988), (430, 1994), (860, 997)]