20389904

素因数分解:

$2^4\times {\mathrm{157}}^1\times {\mathrm{8117}}^1$

素因数の和:8282

約数の個数: 20

約数和(自身を含む): 39761964

約数和(自身を除く): 19372060

約数列:

[1, 2, 4, 8, 16, 157, 314, 628, 1256, 2512, 8117, 16234, 32468, 64936, 129872, 1274369, 2548738, 5097476, 10194952, 20389904]

約数ペア:

[(1, 20389904), (2, 10194952), (4, 5097476), (8, 2548738), (16, 1274369), (157, 129872), (314, 64936), (628, 32468), (1256, 16234), (2512, 8117)]