16689620

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2081}}^1$

素因数の和:2491

約数の個数: 24

約数和(自身を含む): 35152488

約数和(自身を除く): 18462868

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2081, 4010, 4162, 8020, 8324, 10405, 20810, 41620, 834481, 1668962, 3337924, 4172405, 8344810, 16689620]

約数ペア:

[(1, 16689620), (2, 8344810), (4, 4172405), (5, 3337924), (10, 1668962), (20, 834481), (401, 41620), (802, 20810), (1604, 10405), (2005, 8324), (2081, 8020), (4010, 4162)]