20489156

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{857}}^1$

素因数の和:1043

約数の個数: 24

約数和(自身を含む): 36996960

約数和(自身を除く): 16507804

約数列:

[1, 2, 4, 43, 86, 139, 172, 278, 556, 857, 1714, 3428, 5977, 11954, 23908, 36851, 73702, 119123, 147404, 238246, 476492, 5122289, 10244578, 20489156]

約数ペア:

[(1, 20489156), (2, 10244578), (4, 5122289), (43, 476492), (86, 238246), (139, 147404), (172, 119123), (278, 73702), (556, 36851), (857, 23908), (1714, 11954), (3428, 5977)]