18988940

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{20201}}^1$

素因数の和:20257

約数の個数: 24

約数和(自身を含む): 40727232

約数和(自身を除く): 21738292

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 20201, 40402, 80804, 101005, 202010, 404020, 949447, 1898894, 3797788, 4747235, 9494470, 18988940]

約数ペア:

[(1, 18988940), (2, 9494470), (4, 4747235), (5, 3797788), (10, 1898894), (20, 949447), (47, 404020), (94, 202010), (188, 101005), (235, 80804), (470, 40402), (940, 20201)]