21457818

素因数分解:

$2^1\times 3^3\times {\mathrm{157}}^1\times {\mathrm{2531}}^1$

素因数の和:2699

約数の個数: 32

約数和(自身を含む): 48006720

約数和(自身を除く): 26548902

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 157, 314, 471, 942, 1413, 2531, 2826, 4239, 5062, 7593, 8478, 15186, 22779, 45558, 68337, 136674, 397367, 794734, 1192101, 2384202, 3576303, 7152606, 10728909, 21457818]

約数ペア:

[(1, 21457818), (2, 10728909), (3, 7152606), (6, 3576303), (9, 2384202), (18, 1192101), (27, 794734), (54, 397367), (157, 136674), (314, 68337), (471, 45558), (942, 22779), (1413, 15186), (2531, 8478), (2826, 7593), (4239, 5062)]