20999308

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{1009}}^1$

素因数の和:1078

約数の個数: 36

約数和(自身を含む): 41373640

約数和(自身を除く): 20374332

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 121, 172, 242, 473, 484, 946, 1009, 1892, 2018, 4036, 5203, 10406, 11099, 20812, 22198, 43387, 44396, 86774, 122089, 173548, 244178, 477257, 488356, 954514, 1909028, 5249827, 10499654, 20999308]

約数ペア:

[(1, 20999308), (2, 10499654), (4, 5249827), (11, 1909028), (22, 954514), (43, 488356), (44, 477257), (86, 244178), (121, 173548), (172, 122089), (242, 86774), (473, 44396), (484, 43387), (946, 22198), (1009, 20812), (1892, 11099), (2018, 10406), (4036, 5203)]