21986478

素因数分解:

$2^1\times 3^4\times {\mathrm{135719}}^1$

素因数の和:135733

約数の個数: 20

約数和(自身を含む): 49266360

約数和(自身を除く): 27279882

約数列:

[1, 2, 3, 6, 9, 18, 27, 54, 81, 162, 135719, 271438, 407157, 814314, 1221471, 2442942, 3664413, 7328826, 10993239, 21986478]

約数ペア:

[(1, 21986478), (2, 10993239), (3, 7328826), (6, 3664413), (9, 2442942), (18, 1221471), (27, 814314), (54, 407157), (81, 271438), (162, 135719)]