21006940

素因数分解:

$2^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{2437}}^1$

素因数の和:2877

約数の個数: 24

約数和(自身を含む): 44235072

約数和(自身を除く): 23228132

約数列:

[1, 2, 4, 5, 10, 20, 431, 862, 1724, 2155, 2437, 4310, 4874, 8620, 9748, 12185, 24370, 48740, 1050347, 2100694, 4201388, 5251735, 10503470, 21006940]

約数ペア:

[(1, 21006940), (2, 10503470), (4, 5251735), (5, 4201388), (10, 2100694), (20, 1050347), (431, 48740), (862, 24370), (1724, 12185), (2155, 9748), (2437, 8620), (4310, 4874)]