20394860

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2543}}^1$

素因数の和:2953

約数の個数: 24

約数和(自身を含む): 42952896

約数和(自身を除く): 22558036

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2543, 4010, 5086, 8020, 10172, 12715, 25430, 50860, 1019743, 2039486, 4078972, 5098715, 10197430, 20394860]

約数ペア:

[(1, 20394860), (2, 10197430), (4, 5098715), (5, 4078972), (10, 2039486), (20, 1019743), (401, 50860), (802, 25430), (1604, 12715), (2005, 10172), (2543, 8020), (4010, 5086)]