21591820

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{2437}}^1$

素因数の和:2889

約数の個数: 24

約数和(自身を含む): 45463824

約数和(自身を除く): 23872004

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 2437, 4430, 4874, 8860, 9748, 12185, 24370, 48740, 1079591, 2159182, 4318364, 5397955, 10795910, 21591820]

約数ペア:

[(1, 21591820), (2, 10795910), (4, 5397955), (5, 4318364), (10, 2159182), (20, 1079591), (443, 48740), (886, 24370), (1772, 12185), (2215, 9748), (2437, 8860), (4430, 4874)]