20390020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{145643}}^1$

素因数の和:145659

約数の個数: 24

約数和(自身を含む): 48936384

約数和(自身を除く): 28546364

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 145643, 291286, 582572, 728215, 1019501, 1456430, 2039002, 2912860, 4078004, 5097505, 10195010, 20390020]

約数ペア:

[(1, 20390020), (2, 10195010), (4, 5097505), (5, 4078004), (7, 2912860), (10, 2039002), (14, 1456430), (20, 1019501), (28, 728215), (35, 582572), (70, 291286), (140, 145643)]