21061840

素因数分解:

$2^4\times 5^1\times {\mathrm{263273}}^1$

素因数の和:263286

約数の個数: 20

約数和(自身を含む): 48968964

約数和(自身を除く): 27907124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263273, 526546, 1053092, 1316365, 2106184, 2632730, 4212368, 5265460, 10530920, 21061840]

約数ペア:

[(1, 21061840), (2, 10530920), (4, 5265460), (5, 4212368), (8, 2632730), (10, 2106184), (16, 1316365), (20, 1053092), (40, 526546), (80, 263273)]