21679810

素因数分解:

$2^1\times 5^1\times {\mathrm{311}}^1\times {\mathrm{6971}}^1$

素因数の和:7289

約数の個数: 16

約数和(自身を含む): 39154752

約数和(自身を除く): 17474942

約数列:

[1, 2, 5, 10, 311, 622, 1555, 3110, 6971, 13942, 34855, 69710, 2167981, 4335962, 10839905, 21679810]

約数ペア:

[(1, 21679810), (2, 10839905), (5, 4335962), (10, 2167981), (311, 69710), (622, 34855), (1555, 13942), (3110, 6971)]