21291966

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{27509}}^1$

素因数の和:27560

約数の個数: 24

約数和(自身を含む): 47207160

約数和(自身を除く): 25915194

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 129, 258, 387, 774, 27509, 55018, 82527, 165054, 247581, 495162, 1182887, 2365774, 3548661, 7097322, 10645983, 21291966]

約数ペア:

[(1, 21291966), (2, 10645983), (3, 7097322), (6, 3548661), (9, 2365774), (18, 1182887), (43, 495162), (86, 247581), (129, 165054), (258, 82527), (387, 55018), (774, 27509)]