20398340

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{23719}}^1$

素因数の和:23771

約数の個数: 24

約数和(自身を含む): 43834560

約数和(自身を除く): 23436220

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 23719, 47438, 94876, 118595, 237190, 474380, 1019917, 2039834, 4079668, 5099585, 10199170, 20398340]

約数ペア:

[(1, 20398340), (2, 10199170), (4, 5099585), (5, 4079668), (10, 2039834), (20, 1019917), (43, 474380), (86, 237190), (172, 118595), (215, 94876), (430, 47438), (860, 23719)]