21164072

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1399}}^1$

素因数の和:1497

約数の個数: 32

約数和(自身を含む): 41664000

約数和(自身を除く): 20499928

約数列:

[1, 2, 4, 8, 31, 61, 62, 122, 124, 244, 248, 488, 1399, 1891, 2798, 3782, 5596, 7564, 11192, 15128, 43369, 85339, 86738, 170678, 173476, 341356, 346952, 682712, 2645509, 5291018, 10582036, 21164072]

約数ペア:

[(1, 21164072), (2, 10582036), (4, 5291018), (8, 2645509), (31, 682712), (61, 346952), (62, 341356), (122, 173476), (124, 170678), (244, 86738), (248, 85339), (488, 43369), (1399, 15128), (1891, 11192), (2798, 7564), (3782, 5596)]