18745820

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8599}}^1$

素因数の和:8717

約数の個数: 24

約数和(自身を含む): 39732000

約数和(自身を除く): 20986180

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8599, 17198, 34396, 42995, 85990, 171980, 937291, 1874582, 3749164, 4686455, 9372910, 18745820]

約数ペア:

[(1, 18745820), (2, 9372910), (4, 4686455), (5, 3749164), (10, 1874582), (20, 937291), (109, 171980), (218, 85990), (436, 42995), (545, 34396), (1090, 17198), (2180, 8599)]