21657724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{11447}}^1$

素因数の和:11505

約数の個数: 24

約数和(自身を含む): 42311808

約数和(自身を除く): 20654084

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 172, 473, 946, 1892, 11447, 22894, 45788, 125917, 251834, 492221, 503668, 984442, 1968884, 5414431, 10828862, 21657724]

約数ペア:

[(1, 21657724), (2, 10828862), (4, 5414431), (11, 1968884), (22, 984442), (43, 503668), (44, 492221), (86, 251834), (172, 125917), (473, 45788), (946, 22894), (1892, 11447)]