8781820

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2081}}^1$

素因数の和:2301

約数の個数: 24

約数和(自身を含む): 18538128

約数和(自身を除く): 9756308

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2081, 2110, 4162, 4220, 8324, 10405, 20810, 41620, 439091, 878182, 1756364, 2195455, 4390910, 8781820]

約数ペア:

[(1, 8781820), (2, 4390910), (4, 2195455), (5, 1756364), (10, 878182), (20, 439091), (211, 41620), (422, 20810), (844, 10405), (1055, 8324), (2081, 4220), (2110, 4162)]