21263011

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{383}}^1$

素因数の和:511

約数の個数: 24

約数和(自身を含む): 27316224

約数和(自身を除く): 6053213

約数列:

[1, 7, 11, 49, 77, 103, 383, 539, 721, 1133, 2681, 4213, 5047, 7931, 18767, 29491, 39449, 55517, 206437, 276143, 433939, 1933001, 3037573, 21263011]

約数ペア:

[(1, 21263011), (7, 3037573), (11, 1933001), (49, 433939), (77, 276143), (103, 206437), (383, 55517), (539, 39449), (721, 29491), (1133, 18767), (2681, 7931), (4213, 5047)]