20628559

素因数分解:

$7^2\times {\mathrm{73}}^2\times {\mathrm{79}}^1$

素因数の和:239

約数の個数: 18

約数和(自身を含む): 24637680

約数和(自身を除く): 4009121

約数列:

[1, 7, 49, 73, 79, 511, 553, 3577, 3871, 5329, 5767, 37303, 40369, 261121, 282583, 420991, 2946937, 20628559]

約数ペア:

[(1, 20628559), (7, 2946937), (49, 420991), (73, 282583), (79, 261121), (511, 40369), (553, 37303), (3577, 5767), (3871, 5329)]