20821059

素因数分解:

$3^2\times 7^1\times {\mathrm{167}}^1\times {\mathrm{1979}}^1$

素因数の和:2159

約数の個数: 24

約数和(自身を含む): 34594560

約数和(自身を除く): 13773501

約数列:

[1, 3, 7, 9, 21, 63, 167, 501, 1169, 1503, 1979, 3507, 5937, 10521, 13853, 17811, 41559, 124677, 330493, 991479, 2313451, 2974437, 6940353, 20821059]

約数ペア:

[(1, 20821059), (3, 6940353), (7, 2974437), (9, 2313451), (21, 991479), (63, 330493), (167, 124677), (501, 41559), (1169, 17811), (1503, 13853), (1979, 10521), (3507, 5937)]