18798140

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8623}}^1$

素因数の和:8741

約数の個数: 24

約数和(自身を含む): 39842880

約数和(自身を除く): 21044740

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8623, 17246, 34492, 43115, 86230, 172460, 939907, 1879814, 3759628, 4699535, 9399070, 18798140]

約数ペア:

[(1, 18798140), (2, 9399070), (4, 4699535), (5, 3759628), (10, 1879814), (20, 939907), (109, 172460), (218, 86230), (436, 43115), (545, 34492), (1090, 17246), (2180, 8623)]