9990020

素因数分解:

$2^2\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1093}}^1$

素因数の和:1559

約数の個数: 24

約数和(自身を含む): 21044184

約数和(自身を除く): 11054164

約数列:

[1, 2, 4, 5, 10, 20, 457, 914, 1093, 1828, 2186, 2285, 4372, 4570, 5465, 9140, 10930, 21860, 499501, 999002, 1998004, 2497505, 4995010, 9990020]

約数ペア:

[(1, 9990020), (2, 4995010), (4, 2497505), (5, 1998004), (10, 999002), (20, 499501), (457, 21860), (914, 10930), (1093, 9140), (1828, 5465), (2186, 4570), (2285, 4372)]