21052339

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{2707}}^1$

素因数の和:2826

約数の個数: 16

約数和(自身を含む): 26516736

約数和(自身を除く): 5464397

約数列:

[1, 7, 11, 77, 101, 707, 1111, 2707, 7777, 18949, 29777, 208439, 273407, 1913849, 3007477, 21052339]

約数ペア:

[(1, 21052339), (7, 3007477), (11, 1913849), (77, 273407), (101, 208439), (707, 29777), (1111, 18949), (2707, 7777)]