21557228

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{69991}}^1$

素因数の和:70013

約数の個数: 24

約数和(自身を含む): 47034624

約数和(自身を除く): 25477396

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 308, 69991, 139982, 279964, 489937, 769901, 979874, 1539802, 1959748, 3079604, 5389307, 10778614, 21557228]

約数ペア:

[(1, 21557228), (2, 10778614), (4, 5389307), (7, 3079604), (11, 1959748), (14, 1539802), (22, 979874), (28, 769901), (44, 489937), (77, 279964), (154, 139982), (308, 69991)]