12840405

素因数分解:

$3^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4057}}^1$

素因数の和:4276

約数の個数: 16

約数和(自身を含む): 20647104

約数和(自身を除く): 7806699

約数列:

[1, 3, 5, 15, 211, 633, 1055, 3165, 4057, 12171, 20285, 60855, 856027, 2568081, 4280135, 12840405]

約数ペア:

[(1, 12840405), (3, 4280135), (5, 2568081), (15, 856027), (211, 60855), (633, 20285), (1055, 12171), (3165, 4057)]