408072020

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{187189}}^1$

素因数の和:187307

約数の個数: 24

約数和(自身を含む): 864817800

約数和(自身を除く): 456745780

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 187189, 374378, 748756, 935945, 1871890, 3743780, 20403601, 40807202, 81614404, 102018005, 204036010, 408072020]

約数ペア:

[(1, 408072020), (2, 204036010), (4, 102018005), (5, 81614404), (10, 40807202), (20, 20403601), (109, 3743780), (218, 1871890), (436, 935945), (545, 748756), (1090, 374378), (2180, 187189)]