20887724

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{53}}^2$

素因数の和:147

約数の個数: 54

約数和(自身を含む): 44010036

約数和(自身を除く): 23122312

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 53, 106, 143, 169, 212, 286, 338, 572, 583, 676, 689, 1166, 1378, 1859, 2332, 2756, 2809, 3718, 5618, 7436, 7579, 8957, 11236, 15158, 17914, 30316, 30899, 35828, 36517, 61798, 73034, 98527, 123596, 146068, 197054, 394108, 401687, 474721, 803374, 949442, 1606748, 1898884, 5221931, 10443862, 20887724]

約数ペア:

[(1, 20887724), (2, 10443862), (4, 5221931), (11, 1898884), (13, 1606748), (22, 949442), (26, 803374), (44, 474721), (52, 401687), (53, 394108), (106, 197054), (143, 146068), (169, 123596), (212, 98527), (286, 73034), (338, 61798), (572, 36517), (583, 35828), (676, 30899), (689, 30316), (1166, 17914), (1378, 15158), (1859, 11236), (2332, 8957), (2756, 7579), (2809, 7436), (3718, 5618)]